Yard sales are the best! During the summer, the library in Woodstock actually hosts a big library sale every other weekend. I make it a point to visit it at least a few times. You can walk out of there with huge bags full of books for only a few dollars. And they have an amazing selection! So many of the residents work in publishing or the art industry, so they'll donate their old reviewer copies of new novels or even signed editions. I can't wait until it starts up again this year, I can usually get enough books there to keep me going all year long.