Instead of old books and movies sitting on a shelf collecting dust, how about swapping them for something more useful?

With the World Wide Web at your fingertips, the saying "One man's trash is another man's treasure," takes on a whole new meaning. So here are some sites that offer you the opportunity to clean out the closet, and make room for your new recycled riches.

For the book worms, PaperBackSwap.com is a world wide online library. With more than three million choices, you should have no problem finding a story to wrap up in. There are no late fees - mail a book and get a book in return. You can print the postage directly from your computer.