I use anki, a Spaced Repetition flashcard app. When learning a new tool/framework/etc, I make flashcards asking why it does things a certain way. This helps me

I use anki, a Spaced Repetition flashcard app. When learning a new tool/framework/etc, I make flashcards asking why it does things a certain way. This helps me learn the mental model of the tool more quickly. I also make a flashcard if I spend a long time debugging something so that I make sure to keep the knowledge that I gained from the bug hunt.