Contrary to the belief of some of my friends and ex-roommates over the years, I like to get rid of stuff. For me that can mean books, old computers, furnature.. whatever. I really don't have the patience to eBay stuff or put ads in craigslist or the paper so usually the stuff ends up in the trash.
In the Best of Philly issue this month I saw a blurb about a website called freecycle.org where one can post stuff that they are about to trash and others in the area can browse the listings and maybe come get your crap, thus saving landfill space.
The local Philadelphia chapter can be found here. My stuff may soon be there..