For folks who want to know how to memorise things effectively, I always pointed them to the Anki app and considered my job done.
While I will still point them to the app, my first port of call will be Nicky Case’s delightful new explorable mini site, “How To Remember Anything Forever-ish”

It’s whimsical, delightful, and explains memory & how to work with it beautifully as you read the funny, pithy explorable.
Definitely worth your time & attention.