One thing about moving, it's a great time to get rid of stuff you don't need or use anymore. Getting rid of things, however, doesn't necessarily mean throwing them away. Allison and I have a lot of old books we bought and read years ago, and probably won't read again. Rather than moving all of them to the new house and taking up space, I listed many of the books on half.com. Half is an ebay owned site, which specializes in selling books and dvd's at a low, fixed price. It's safer than regular ebay for a seller, since the buyer pays half.com directly, and half pays the seller twice a month.
I'm not going to get rich selling used books, considering the book I just sold went for $1.43, and half.com takes $.21 of that. They do include money for shipping though, and the actual shipping cost in this case was a little less than what they gave me. Bonus!
On the other hand, if you've got used textbooks to part with, you can generally get some pretty good money for them. I remember selling one some time ago for more than $30.
Besides books and movies, I've got some other miscellaneous stuff that I'm going to try listing on ebay. Cables, parts, pieces, etc that I don't need anymore, but you never know who might be willing to pay $1 for a pci network card, or a data cable for an old motorola phone. If it doesn't sell, it goes in the garbage, and I'm out a few cents for listing it. If it does, it goes in the mail, and I've got some extra pocket change. Plus, I know the item went to someone who will appreciate the bargain, rather than going out to a store and buying whatever they need new.