When I pick up a book to read I place a piece of junk mail (already folded on three) with a blank side as my bookmark for the book and the place where I take short notes about sentences or paragraphs that interest me, together with their page number. For short books, a single A4 might be enough, but many times I add a second or more pieces.

When I finish reading the book, or some times a chapter or a part of the book, I review the notes and come back to some of the pages to re-read them and further think about them. And afer a few weeks I go through them again in a similar way.

Most of the times, I just kept those notes either inside the book (if it was mine) or in an archive (after returning the book to the library), and I rarely processed them further, unless I needed to use them for something, like writing about the topic, or discuss it with other people, etc.

With all the movement about taking smart notes, building a "second brain", etc., in recent years, I learnt about the book How to Take Smart Notes: One Simple Technique to Boost Writing, Learning and Thinking – for Students, Academics and Nonfiction Book Writers, and Zettelkasten, and then identified the notes I use to take as literature notes (by those methods of note taking).

Now I'm starting to revisit those literature notes after finishing reading the book to take some new (so called "permanent") notes on Logseq, where they get linked to other notes, ideas, etc., and I can find them easier than browsing through all my "literature" notes.

I don't have a huge collection of notes on Logseq yet, but I'm enjoying the process, and I definitely appreciate being able to find and access them quickly and easily.