Five memory techniques that work at any age

First, the honest framing. Everything below is about learning — getting vocabulary, chords, dates and procedures to stick. The techniques are well studied and work for adults of any age. They are not a treatment for a memory that has started to worry you. The US National Institute on Aging’s advice is plain: if you are noticing changes in your memory, talk to a doctor, who can test for the many treatable causes. Do that first.

1. Spaced repetition

The most robust finding in learning research is that spreading practice over time beats cramming. John Dunlosky and colleagues’ 2013 review of ten study techniques rated “distributed practice” as one of only two high-utility methods: people “will retain knowledge and skills for a longer period of time when they distribute their practice than when they mass it”, even with the same total hours.

Spaced repetition turns that into a schedule. Meet a fact today. See it tomorrow. If you still know it, next in three days, then a week, then a month. Forget it and it drops back to tomorrow. Effort goes to what is slipping. Run it with index cards in a three-section box, or a flashcard app that schedules for you. Ten minutes a day is plenty.

2. Retrieval practice

Dunlosky’s other high-utility technique is practice testing: pulling the answer out of your head rather than looking at it again. Practice tests “can substantially boost” learning compared with rereading. The same review rated rereading, highlighting and summarising as low utility — awkward, because rereading was the technique most students in the survey said they used.

This is the one to change today. Close the book and write down what you remember. Cover the answer column before you flip the card. Play the piece from memory before you look at the score. It feels worse than rereading, because rereading feels fluent and testing feels like failure. The failure is the point: every retrieval, especially a struggling one, strengthens the path.

A flashcard box is spaced retrieval practice, which is why it has outlived two centuries of educational fashion.

3. The memory palace

The method of loci is the oldest trick in the book; Roman orators used it. Take a route you know intimately and place each thing you want to remember at a point along it as a vivid image. To recall the list, walk the route in your mind.

Does it work after 50? A 2021 study in the Journals of Gerontology trained 359 adults aged 20 to 90 with a smartphone app over three months. People aged 55 to 69 reached the same proficiency as those under 55. The 70-to-90 group got there too, but needed over 100 practice trials to reach the level younger adults hit after 31 to 50. Two caveats: the gains did not transfer to face–name pairs, and the everyday effect was self-reported — about half said their day-to-day memory had improved, mostly for shopping lists. A 2021 study in Frontiers in Psychology found a similar shape in 71 healthy adults: a significant but small improvement in word-list recall after one session (median recall rose from 17.5 to 19 items out of 25).

Honest summary: it works for lists, takes older learners more practice, and will not help with names.

4. Chunking

Working memory — the mental notepad you hold things on while you use them — is small and does not grow. What changes how much you can hold is the size of the pieces. A phone number is impossible as eleven digits and easy as three groups. A chord progression is four shapes until it becomes “the one from that song”.

You cannot force chunking, but you can arrange for it: learn phrases not words, bars not notes, procedures not steps, and attach the new thing to something you already know.

5. Sleep

None of the above happens without the night in between. NIH News in Health reports that sleep after learning “is essential to help save and cement that new information into the architecture of the brain”, that learning ability can drop by up to 40% without adequate sleep, and that a night of four hours or less will not strengthen the day’s memories. It also notes that adults over 60 get around 70% less deep sleep than people aged 18 to 25 — which makes protecting what you have matter more.

The practical version: seven to eight hours, and a two-minute review before bed so the day’s material goes into sleep fresh.

What about brain-training apps?

They train the task. The Alzheimer’s Society’s summary is that brain training “can make you better at specific tasks, but does not improve thinking in general”, with no strong evidence it reduces dementia risk. The five techniques above are different in kind: ways of learning whatever you want to learn. If you want them built into an eight-week habit, our Sharp course does that.

This week

• Convert one thing you are learning into 20 flashcards and test yourself on them, morning and evening, for seven days.
• Put next week’s shopping list in a memory palace made of your own hallway.
• Learn one phrase, one bar or one procedure as a chunk, not as parts.
• Guard the sleep after study: earlier night, later session, or both.

Then read Keeping your mind sharp after 50 for the bigger picture, and Learning a language after 50 for these techniques in a 12-week plan.