[https://en.m.wikipedia.org/wiki/Spaced_repetition Spaced Repetition] (Wikipedia)

Has everyone here has stated, Writing the information is a very effective way to reinforce your retention of it. You can make it even more effective by writing the information in the form of a flash card, and then using spaced repetition to reinforce the information until you have mastered it.

There are a lot of good flash card applications out there that use this technique; my favorite is [https://www.ankiapp.com AnkiApp]. (AnkiApp.com)