I rate books’ perceived potential from 0 to 10 (I actually just label anything below 7 as bad as I’ll never read those). I use Goodreads/Amazon’s ratings/reviews, the source I used to find the book, its Goodreads summary, and its authors to estimate its relevance to my goals, its quality in achieving its purported aim, and its relative quality in the memesphere it tries to elucidate. I use Goodreads exclusive shelves to label each book’s potential and also shelf it under what it teaches. I then browse my Goodreads’ shelves when I’m out of books. This whole approach doesn’t work very efficiently though, as I have trouble assessing books’ qualities and my own priorities.