You read the chapter. Twice. You highlighted half of it in yellow and the other half in green. Three days later, someone asks you a simple question about it and your mind goes blank.
That isn’t laziness, and it doesn’t mean you have a bad memory. It’s mostly a strategy problem.
Back in the 1880s, the German psychologist Hermann Ebbinghaus memorized lists of nonsense syllables and tracked how fast he forgot them. The curve he drew drops steeply at first and then levels off, and most of us still study as if that curve didn’t exist. We cram, we reread, we hope.
The good news is that memory research has moved on a lot since then. Some techniques reliably beat others, and several of the best ones cost nothing but a bit of discomfort. If you want the wider picture beyond studying, we’ve also collected science-backed memory methods you can use right now.
Below are eleven of them. Each comes with the evidence, its limits, and one small thing to do this week.
1. Quiz yourself instead of rereading
Rereading feels productive. The words look familiar, the page flows, and you think you’ve got it. In practice it’s studying on autopilot, and the familiarity lies to you.
Jeffrey Karpicke, a psychologist at Purdue University, studies what he calls retrieval-based learning, and his updated 2025 review chapter in Learning and Memory: A Comprehensive Reference lays out the case. In one of his best-known experiments with Henry Roediger (2006), students who recalled a text three times beat students who read it four times on a test a week later. They spent less time looking at the material and remembered more of it. Karpicke’s summary is blunt: “Testing does more than merely assess learning.” A 2014 meta-analysis by Rowland, which Karpicke also covers, found an average advantage of g = 0.50 for retrieval over restudying, and retrieval came out ahead in 81% of the comparisons.
There’s a catch, though. In January 2026, Kevin Sigayret and colleagues at the Université de Toulouse ran two online versions of the experiment on the Prolific platform and found no reliable benefit. Most participants dropped out before the end (only about 40% and 30% finished), and the authors put the null result down to low engagement. A half-hearted quiz you click through doesn’t work the same way.
Your move: close the book after each section and write down everything you remember on a blank page. Then open it and check what you missed.
2. Spread your study over days, not hours
Cramming works on the night before a test. It also explains why the material is gone a week later.
The latest classroom evidence comes from Rhys Mawson and Sean Kang at the University of Melbourne. Their June 2025 meta-analysis of distributed practice in real classrooms pulled together 22 studies, 31 effect sizes and more than 3,000 learners, and spaced practice beat massed practice with a moderate effect (d = 0.54). Two details matter for your calendar. Fixed gaps of about seven days between sessions gave the most consistent results, and the biggest gains showed up with only two or three exposures. You don’t need to review twenty times. You just need to come back.
Keep the limits in mind. The studies varied a lot, and few of them were done at university level.
If you tend to leave everything until the last minute, the problem may be procrastination more than memory, and that’s worth fixing first.
Start small: this week, put a 20-minute review of today’s topic in your calendar exactly seven days from now.
3. Mix up your topics and problem types
Most textbooks teach in blocks. Ten problems on fractions, then ten on percentages. It feels smooth, and that smoothness is the problem.
Interleaving means shuffling related types together, so you have to work out which approach each item needs before you solve it. A 2025 paper by Steven Pan and colleagues in Learning and Individual Differences tested it with 318 adults across two studies. People learned to recognize the painting styles of 12 artists, either in blocks or mixed. Interleaving raised accuracy by about 24 percentage points in the first study and 18 in the second, and between 79% and 91% of participants benefited. Learners with higher fluid intelligence gained the most, but most people gained something.
The same paper adds a useful caution. When participants learned to classify psychological disorders from written case studies, interleaving helped very little, or not at all. It seems to work best when you need to tell similar-looking things apart.
Next time, do this: take your practice questions from three chapters, shuffle them, and work through the mixed pile.
4. Build a memory palace for lists
Think about your home. You can walk through it in your head without any effort: front door, hallway, kitchen, the chair with clothes piled on it. You’ve stored that route for years.
A memory palace, or the method of loci, uses that route like a row of coat hooks. You hang one item you need to remember on each spot, ideally as a strange or funny image, and then walk the route to collect them. The comparison only goes so far. Coat hooks hold any coat you give them, but this method works best for ordered lists, sequences and key terms. It won’t make you understand a proof.
It’s also more than a party trick. In a 2021 study in Science Advances, Isabella Wagner and colleagues trained 50 complete beginners for six weeks, about 30 minutes a day. Four months later, the method-of-loci group recalled roughly 50 words from a list, compared with around 30 for people who did working-memory training and 27 for those who had no training at all. The study is from 2021, so it’s older than most sources here, but it’s still the most rigorous training trial on the method.
Give it a go: pick five stops in your flat and use them to memorize the five stages of a process you’re studying right now.
5. Take quiet breaks, not scrolling breaks
What you do in the ten minutes after studying matters more than you’d think.
A 2025 meta-analysis in Psychonomic Bulletin & Review by Weng and colleagues pooled 37 studies (82 comparisons) on wakeful rest, meaning simply sitting quietly with no new input after learning. Resting improved memory compared with doing another task (g = 0.45 right away), and a smaller benefit (g = 0.27) was still there after seven days. Whether people kept their eyes open or closed, or how long they rested, didn’t seem to change the result much.
Then comes the part that hurts. In a 2026 study in the same journal, Martini and colleagues had university students spend 7.5 minutes after learning a word list either resting with eyes closed or using social media. Resting won, and the gap was still there a day later. Hearing the list a second time did even better than resting, which is worth knowing too. The authors call rest “an effective and easy-to-implement strategy,” but repetition still came out on top.
When you’re deep in focus, don’t break a good flow state just because a timer went off. When you do stop, though, keep the stop quiet.
A quick experiment: after your next study block, sit for five minutes with your phone in another room and let your mind wander.
6. Explain why it’s true
Here’s the mechanism. A fact you learn on its own has one thread holding it in place. When you explain why it’s true, how it connects to something you already know, or what would follow from it, you tie extra threads to it. Each one is another route your memory can take when you try to find it later. Repeating the fact in your own words adds no new threads.
The research backs the “why” part specifically. A preregistered study of 208 people, published in Applied Cognitive Psychology in the May/June 2026 issue, found that asking learners to self-explain fictional facts did no better than rereading them, either right away or two weeks later. When the researchers looked closer, the quality of the explanations mattered. People who drew more correct inferences scored higher, and people who just paraphrased didn’t. Older work is more upbeat. Kiran Bisra and colleagues’ 2018 meta-analysis of 64 reports and 5,917 participants found a solid average benefit for self-explanation across a range of tasks (g = 0.55).
So explaining is no magic trick. You have to do it well.
Explaining things out loud to a friend helps here too, and if you feel awkward about it, practicing how to have a good conversation makes study sessions with others a lot easier.
Test it this week: for every key fact in your notes, add one line that starts with “because” or “which means”.
7. Protect your sleep, especially before an exam
The all-nighter is a student tradition, and it’s a bad deal.
In May 2025, Tara Kuhn, Jennifer Heisz and Laura Middleton published an analysis of a survey of 1,258 undergraduates at two Canadian universities in Frontiers in Education. Poorer sleep quality was linked to lower grades. The relationship with sleep duration was curved: students who slept very little and students who slept a lot both did worse than those in the middle. Once stress and depression were taken into account, sleep quality lost most of its link with grades, while duration stayed significant. This is correlational and self-reported (the survey was run in March 2022), so it can’t prove that sleep causes better grades.
A small 2025 experiment in Brain Sciences by Serena Malloggi and colleagues points to a mechanism. Ten students learned a prose passage before either a night’s sleep or a day awake. After sleep, they recalled slightly more than they had right after studying. After a day awake, they recalled less. Ten people is a tiny sample, so treat it as a hint.
If you struggle to stay awake during the day, here are ways to fight sleepiness without wrecking your night.
The night before your next exam, stop studying an hour before bed and do a quick self-quiz instead of a final cram.
8. Draw it, even if you can’t draw
You don’t need talent. Stick figures count.
The drawing effect was described by Jeffrey Wammes, Melissa Meade and Myra Fernandes at the University of Waterloo in 2016. Students who drew simple words for 40 seconds often recalled more than twice as many as students who wrote the same words out repeatedly. The quality of the drawing didn’t matter, and even four seconds of sketching helped.
A study in the January 2025 issue of Memory & Cognition by Levi, Fernandes and colleagues shows how robust the effect is. The 22 healthy participants remembered drawn words better than written ones. The advantage was even larger in three patients with damage to the hippocampus, the brain structure most associated with forming new memories. The authors think drawing recruits extra visual, motor and meaning-based processing, which gives a memory more to hold on to. With only a handful of patients, though, that part is suggestive.
Here’s a simple way in: turn one page of tomorrow’s notes into a rough diagram or cartoon, with no full sentences allowed.
9. Put your phone in another room
This one sounds obvious, but the numbers are still sobering.
The OECD released its PISA 2025 results in September 2026, covering 15-year-olds in 91 countries. On average, 28% of students said classmates were distracted by digital devices in most or every science lesson. Using devices for leisure at school for more than an hour a day was consistently associated with lower science scores, and distraction was linked to lower performance in more than two-thirds of the education systems tested. Andreas Schleicher, the OECD’s director for education and skills, described leisure use during school hours as linked to “substantially lower levels of student performance.” All of this is correlational, and PISA tests teenagers, not university students. Still, the pattern is consistent, and more schools are acting on it. Nearly half of OECD students now attend schools that ban phones on the premises, up from 34% in 2022.
A buzzing phone also gives you an easy excuse to avoid the hard work of studying, so if you keep catching yourself picking it up, read our guide on how to stop procrastinating.
Before you sit down to study, physically put the phone in another room. Out of reach works better than face down on the desk.
10. Move your body around study time
Whether a single workout helps you remember this afternoon’s lecture is less clear than fitness posters suggest.
The most recent meta-analysis we found is by Ahmed Qazi and colleagues, published in Frontiers in Cognition in 2024. It pulled together 42 experiments and looked at when the exercise happened. Exercising before learning gave a small benefit (d = 0.23), larger for free recall (0.40). Exercising during learning did nothing (d = −0.04). Exercising after learning helped a bit more (d = 0.33). The authors also found signs of publication bias in the “before” studies, so the real effect may be smaller.
A March 2025 study in PLOS ONE shows how modest it can be. Ahmed El-Hagrasy and colleagues had 26 medical and nursing students pedal a bike desk at moderate intensity for 20 minutes around a memory task, and recall wasn’t significantly better than when they sat still. A small sample, a single session, and a fairly clear “maybe.”
So don’t expect a jog to replace studying. A brisk walk before or after a session is a cheap bet, though, and it’s one of the good habits to have for plenty of other reasons.
Worth a try: take a 15-minute walk straight after your next review session instead of opening a new tab.
11. Use AI as a coach, not an answer machine
Almost every student uses AI now. The UK’s Higher Education Policy Institute surveyed 1,054 undergraduates with Savanta in December 2025, and its March 2026 report found that 95% use AI in some form, and almost two-thirds use it to explain concepts.
How you use it matters a lot. In a field experiment published in PNAS in 2025, Hamsa Bastani and colleagues gave nearly 1,000 high school maths students access to GPT-4 during practice. With a standard ChatGPT-style interface, practice scores rose by 48%. When access was taken away for the exam, those same students scored 17% worse than classmates who had never used it. A second version, built with safeguards meant to protect learning, boosted practice scores by 127% and largely avoided the drop. The AI hadn’t helped those students learn. It had done the thinking for them.
That’s the same principle as retrieval practice from point one. Memory gets stronger when your brain does the work of pulling information out. If you’re learning new skills in your twenties, this is one of the best ways to invest in yourself, because how well you can learn shapes everything else.
Next time you open a chatbot to study, tell it: “Quiz me on this topic, one question at a time, and don’t give me the answer until I’ve tried.”
What to do when you slip
You’ll skip a review. You’ll cram the night before at least once. You’ll find yourself an hour into scrolling with the textbook still closed. That’s normal.
Habits take longer to form than the popular “21 days” claim suggests. A December 2024 systematic review in Healthcare by Ben Singh, Carol Maher and colleagues, covering more than 2,600 participants, found a median of 59 to 66 days to form a health habit, with a range from 4 days to 335. A study routine is a habit like any other, so expect it to wobble for the first couple of months.
The spacing research also means a missed session isn’t a disaster. Mawson and Kang found that a handful of reviews spread about a week apart was enough to see benefits. You don’t need a perfect streak. You just need to return.
What does the damage is the story you tell yourself afterwards. “I’m just bad at remembering” turns a missed session into a reason to quit. If that voice is loud, it may be self-sabotage more than a lack of ability. On days when it all goes wrong, it helps to know how to get over a bad day without writing off the whole week.
So when you slip, don’t start over from zero. Pick up the next scheduled review and do a quick self-quiz on what you’ve forgotten. The gaps it shows you are exactly what to study next.
Conclusion
You don’t need a special brain or longer hours to remember more. Quiz yourself instead of rereading, space your sessions out, mix topics, sleep properly, and keep the phone and the chatbot from doing your thinking for you. None of it is glamorous, and some of it feels harder than the old way. That difficulty is a big part of why it works.
Pick two methods from this list for your next study week, not all eleven. See what sticks, then add more.
Want more ideas for studying and learning smarter? Browse our education articles and find your next technique.
