How to learn efficient and effective
Whenever I need to memorize things of the form A -> B, I use Anki. This free software comes for many platforms: Mac OS, Windows, Linux and allows the creation of flashcards. After creating the cards you can then go and quiz yourself and rate how good your answer was. Based on that an algorithm decides how often to show you the same card again. I personally find it super effective – if you don’t cheat.