One time I read "On Writing" by Stephen King. Solid book. About half autobiography, half about writing. One thing I think I remember from the book was that he simply would put a book down if it was bad. I was never in that camp. Even when I absolutely hated something I read it through. King was right. I don't have time for that and shouldn't feel bad for putting something down. There's too much out there to be sifting through one book. This also makes me not feel as bad when I buy a book knowing I have many unread on my shelf. It's just an opportunity to enjoy later.