I just don’t. I have to learn 4 subjects a semester, 12 weeks per subject, roughly 5 sub-topics per week. 240 almost useless chunks of info that I have to get examined on every 6 months. I would top myself if I kept it all in memory. I do my best to learn the concepts, then write my brief understanding in a note system (org-roam). I don’t have to remember any of the shit after I’m done with it.