My technique: read the book first with the active reading technique. Than you make qoustions out the notition. Then you answer the quostions every day, and the things you cant remember that are the things you memorize with the mnemonics technique (loci/link/story/etc.). I like to make donkey bridges and make image from that. The image i place on a door of on a window with the loci technique. And if i can answer all the quostions, i read the book again with the active reading technique, to see if i miss someting. After this you go see documentrys, you go bring the knowledge in practise, and do someting with the new knowledge like expanding.
A another way is that what Dominic o’brien said in one of his books: make a mindmap en memorize the keyword with the loci technique.
Active notetaking: ebook → learn more, study less