Marking passages in physical books with parentheses and margin stars facilitates easy review and later digitization.

“And yeah, and usually when I read a physical book, I just I go through and then if any passage strikes me, I put a little parenthesy at the start of it, a parenthesy at the end, and then a star in the margin so that I can easily find them. And then by the time I get done with the book, there's usually, you know, 30, 40, 50 pages with little stars in it. Sometimes if it's really relevant, I will go back through those stars and take a photo of that passage, highlight the text on my phone, and then copy and paste it into the doc that I'm working on so I can like have the quote or the passage there or whatever.”