Expecting to teach something makes you learn it better.
In a 2014 experiment, students told they would later teach a passage recalled more of it, and organised it better, than students told they would only be tested.
Try this today: Study tonight's topic as if you must explain it to a friend tomorrow.
Expecting to teach enhances learning and organization of knowledge in free recall of text passages — John F. Nestojko, Dung C. Bui, Nate Kornell, Elizabeth L. Bjork (2014) Memory & Cognition, vol. 42 (2014)
Pulling an answer out of memory strengthens it far more than reading it again. Quizzing yourself feels harder, and that effort is exactly what makes it stick.
Try this today: Close your notes and write down everything you remember.
Make It Stick — Peter C. Brown, Henry L. Roediger III, Mark A. McDaniel (2014)