[sotu]

I use flashcards with active recall style learning. There's actually a great app I use called "Active Recall" that sets you up with this - you have to work a bit to get the cards you want but after you can refer back to them easily and it helps with memorization

https://activerecall.com is their site

[kevan]

I've found this really effective too. I've been using Anki instead but same general idea. Ramping up on new topics still takes decent time and effort but I've been really surprised how easy it is to retain things after the initial learn.