How Do I Pick What Books to Read?

Someone asked me that question in the comments, and I've been asked it before. Here's my brief response:

Well, I usually keep a list of books I'm interested in. When I spot one on a blog or in a magazine or recommended by a friend I write the book on the list (or drop it in my cart on Amazon). Over several weeks books will pile up on the list. Once I have my current "to read" stack down to 3-5 books I usually order some more (I like to read several books at a time).

I don't have a...