Really? My retention is always based on creating an action or parallel action. That way the memory forms a stronger association than repetition as to recall you only have to pull up the association. This is why I can retain information from audiobooks so easily and often use them while driving or working out.

I'm the opposite. I have ADHD and I cannot retain shit simply through notes. I have to DO shit.

Seconding. If I read it, I'll hold onto it for a week or so until the test. If I also write it once or twice it'll last a few months and a random assortment for longer still.

Doing shit and creating strong associated memories of course do help tremendously in remembering foundational but few bits of information, but for a large chunk that's not exactly capable of being done regularly.