For me it's based on interest and pleasure. If a topic is interesting, I find it's a pleasure to read. That same book may not be interesting to me a month dow

For me it's based on interest and pleasure. If a topic is interesting, I find it's a pleasure to read. That same book may not be interesting to me a month down the road. A case is my amazon wishlist. Books I wished to read may not get the same priority to read later on. A lot of times, I'll buy the books on impulse and start reading them asap so that I stay interested. Reading should be a joy. If you approach it as a "knowledge gathering exercise", you will soon realize how much time there is to read vs how much there is left to read. If you approach reading as a pleasurable activity, I find the rest takes care of itself. I have bookmarks of long articles I wish to read but never get around to it. As Leo from ZenHabits.com says, it's okay. Let it go. Read what you can in time you have to read. Read with purpose.