Testing oneself on material is key to offsetting forgetting and improving knowledge retention.

“the key aspect of testing yourself is recognizing exactly what you know and don't know and an important component of testing is running up against those things where you say h i can't remember I don't know what comes next or I'm certain that that structure is the fimbria and then you go and you look and you go it's not the fima but guess what I'll never forget for instance the location of the habenula or what it looks like”