If you're a person who likes books, check out Paperbackswap.com. It's a site where people exchange books by listing their books that they're willing to give away for free, and get credits to use to get other people's books. The whole transaction takes place for the price of book rate postage. When you join they start you out with two free book credits, so you can order a couple right off the bat.
I discovered them a few months back and have gotten rid of a huge pile of books I'll never read again nor inflict on my loved ones, and I've acquired a huge pile I'm really excited about. Fiction, nonfiction, paperback and hardcover...they're all free. It's a godsend to fiscally-challenged book nerds.
If you do happen to join, please use my e-mail address, UALabGeek@gmail.com, in the "referred by" section and I'll get a couple of free credits too. (You'll get your reward in heaven, or I'll invite you over for pie. Your choice. But the pie is pretty damn good, and your chances of getting into heaven might be a little iffy. )
One interesting caveat, though. The gay and lesbian section is also the heading under which anti-gay and lesbian books are found. I was browsing through the available books and between volumes of lesbian humor, lesbian mysteries and lesbian erotica I found stories about how much God hates lesbians. Oh, the irony.