How do you decide what books to buy? I've got books running out of my ears, and yet I can't stand to be without some of my favorites. Due to book-blogging and giveaway-entering, I've definitely got more books coming in than I have going out of my bookshelves. I now have a rule that I can't buy a book that's not part of a series I already started. If I win a book in a new series, that's fine; I can keep it. But I can't buy it. I won Shiver a few weeks ago, and I'm so excited to dive in because I wasn't "allowed" to buy it! It may seem like a silly rule, but it's the most strict I can be with myself. I just love reading too much to enforce a strict no-buy rule, but I could use some ideas.
What do you do to keep your book pile from growing? Do you borrow from the library or enforce a "book budget"?