I only read on a kindle, so obviously the marginalia system is out of question. Here’s what I do: I highlight the passage, write a note where I summarize it with my own words. That’s all. But I also have a (physical) notebook where I write using the Feynman technique. On top of it all, I read at least 1 hour a day where I’m fully focused (or at least at 80% capacity) and you know what ? Good shit sticks: I trust my brain to capture what it deems valuable. If I forget something I don’t sweat it, it’s more likely that I don’t need it.

I've heard some good things about https://www.coursera.org/learn/learning-how-to-learn

To get a quick overview try table 4 p. 45 here

http://journals.sagepub.com/doi/pdf/10.1177/1529100612453266

I try to follow

* Distributed learning/practice

* Practice testning

* Interleaved practice

Read too many books, can’t remember.