To make it easy to find the books I might want to read next, I’ve put stickers on the spines of some of them. I’ve prioritised those that I’m halfway through reading, or those that are short, so I can finish them and get rid of them quicker. I’ve also put stickers on some that I should read soon before they go out of date, and those that are relevant to my current projects.
It makes it much easier to just grab a book on the way out, and to see the ones I want to read next, among all the others. I can change my priorities by just switching stickers around at any time.