The most reliable ways to increase memory involve a combination of physical habits, learning strategies, and lifestyle adjustments. No single trick transforms your recall overnight, but several approaches have strong evidence behind them, and many start working within days or weeks.
Exercise Is the Fastest Biological Boost
Aerobic exercise triggers the release of a protein called BDNF (brain-derived neurotrophic factor), which acts like fertilizer for the brain cells responsible for forming and storing memories. In a study published in the Journal of Sports Science & Medicine, 100% of participants who exercised at vigorous intensity for 40 minutes experienced a significant increase in BDNF levels, compared to 0% of those who sat quietly for the same duration. Even moderate exercise for 20 minutes raised BDNF in about two-thirds of participants.
The practical takeaway: aim for at least 20 minutes of cardio that gets your heart rate up noticeably. Running, cycling, swimming, or brisk walking all count. If you can push to 40 minutes at a pace where holding a conversation feels difficult, that appears to offer the greatest benefit. This isn’t a one-time fix. The memory advantages come from doing it consistently, several times a week.
How Sleep Locks In What You’ve Learned
Your brain doesn’t just rest during sleep. It actively reorganizes and strengthens the memories you formed during the day. This process happens primarily during deep sleep (also called slow-wave sleep), when the brain replays new information and transfers it from short-term storage in the hippocampus to longer-term storage across the outer brain. Think of it as moving files from your desktop to a permanent folder.
After deep sleep does this transfer work, REM sleep (the stage associated with dreaming) appears to stabilize and further strengthen those newly relocated memories. The two stages work in sequence, which is one reason a full night of sleep matters more than a few fragmented hours. Cutting your sleep short often means cutting into REM, which comes in longer stretches toward morning. If you’re studying for an exam or trying to retain a new skill, sleeping well that same night is one of the most effective things you can do.
Space Your Learning Out Over Days
Cramming information into one long session feels productive, but spreading the same material over several days produces significantly stronger long-term retention. This is called spaced repetition, and the timing of your review sessions matters.
Research on optimal spacing found that if you need to remember something for a week, reviewing it 3 days after your first study session works best. If you need to remember it for about a month, an 8-day gap between sessions is ideal. One study found that completing one lesson per day over four days led to better long-term recall than doing all the lessons in a single sitting. The general principle: your review session should happen late enough that you have to work a little to recall the material, but not so late that you’ve completely forgotten it.
You can apply this with flashcard apps like Anki, which automate the spacing for you, or simply by scheduling brief review sessions on a calendar. Even 10 to 15 minutes of review at the right interval can outperform an hour of continuous study.
Use Your Environment as a Memory Palace
The Method of Loci (sometimes called a “memory palace”) is one of the oldest and most effective memorization techniques. You mentally walk through a familiar place, like your home or your commute, and place each item you want to remember at a specific location along the route. When you need to recall the list, you simply retrace your mental steps.
This works because your brain is exceptionally good at spatial and visual memory. Attaching abstract information (a grocery list, a sequence of talking points, vocabulary words) to vivid mental images in a familiar place gives your brain multiple retrieval cues instead of just one. A study in Experimental Aging Research found a large effect size (Cohen’s d of 0.84) for participants who used this technique with spaced-out mental “stops,” meaning the more distinct you make each location in your mental walk, the better it works.
Stay Hydrated for Short-Term Recall
This one is surprisingly simple. Losing just 1 to 2% of your body water, a level of dehydration most people wouldn’t even notice as thirst, can impair concentration, slow reaction time, and reduce short-term memory accuracy. For a 150-pound person, that’s roughly 1.5 to 3 pounds of water loss, which can happen easily during a busy morning without a drink, a long meeting, or moderate exercise.
If you find your focus drifting or your recall getting fuzzy partway through the day, a glass of water may genuinely help. This isn’t a cure for deeper memory issues, but it’s the lowest-effort intervention with immediate payoff.
What You Eat Matters Over Time
The MIND diet, a hybrid of Mediterranean and heart-healthy eating patterns emphasizing leafy greens, berries, nuts, whole grains, fish, and olive oil, has been linked to slower cognitive decline. According to research supported by the National Institutes of Health, people who followed the MIND diet most closely had a measurable reduction in their risk of cognitive impairment compared to those who followed it the least. The effect was particularly notable in women, who showed an 8% lower risk of cognitive decline with high adherence.
These aren’t dramatic overnight changes. Diet influences memory over years and decades, protecting the brain structures you’ll rely on later. The most consistent finding across nutrition research is that what’s good for your heart tends to be good for your brain: colorful vegetables, healthy fats, and less processed food.
Mindfulness Can Sharpen Encoding
Brief mindfulness exercises, even under 10 minutes, can improve how well you encode new memories. In a series of experiments, participants who listened to a short mindfulness recording before a memory task performed better on recall tests than those who didn’t. The mechanism is straightforward: mindfulness reduces mental clutter and improves the quality of your attention during the moment you’re actually learning something. If your attention is scattered when information comes in, it never gets properly encoded in the first place.
You don’t need a formal meditation practice. A few minutes of focused breathing before a study session, an important meeting, or any situation where you need to absorb information can make a real difference. The key is doing it right before the learning, not hours earlier.
Stop Outsourcing Everything to Your Phone
When you know you can look something up later, your brain deprioritizes storing that information. This phenomenon, sometimes called the “Google effect,” means that people who search for answers online tend to remember where they found the information (which website, which app) rather than the information itself. A meta-analysis confirmed that when people anticipate future access to information, their actual recall of that information drops, while their memory for the digital location improves.
This isn’t necessarily bad. Knowing where to find information is a useful skill. But if you’re trying to build a stronger memory, deliberately choosing to recall things from your own mind before reaching for your phone can serve as a form of training. Try to remember a phone number, a fact, or a name for 30 seconds before looking it up. That brief retrieval effort strengthens the neural pathway, even if you end up checking your phone anyway.
Supplements: What the Evidence Actually Shows
Most memory supplements are overhyped, but one herb has unusually solid clinical data behind it. Bacopa monnieri, a plant used in traditional Indian medicine, showed significant improvements in both attention and memory quality after just 4 weeks at 300 mg per day in a 12-week trial of healthy elderly adults. A higher dose of 600 mg per day improved the speed of memory recall on a similar timeline. These were meaningful, statistically significant differences compared to placebo.
Bacopa is not a miracle pill. It appears to work gradually, and most benefits in studies show up after several weeks of daily use. It also sometimes causes mild digestive discomfort. But among the crowded field of “brain boosting” supplements, it has more rigorous evidence than most. Other commonly marketed options like ginkgo biloba have far less consistent results in clinical trials.
Putting It All Together
The strategies that improve memory the most are the ones you actually do consistently. If you had to pick just three changes with the best return on effort, they would be: regular aerobic exercise (even 20 minutes several times a week), proper sleep on the nights after you learn something important, and spaced review sessions instead of cramming. Layer in adequate hydration, a few minutes of mindfulness before learning, and deliberate retrieval practice instead of reflexive Googling, and you’re covering nearly every angle that research supports.