Don't throw away your old electronics! 20 states have new laws that have made it impossible for you to just throw away those old computers and cell phones. Check with local laws or the waste hauler in your neck of the woods and you'll find that electronics are no longer accepted at landfills.
This is a good thing. Only ten percent of all electronics made are recycled. That still makes a lot of junk that gets land filled. Not just bulk waste , but also chemicals.
Many local companies have stepped up local e-Waste programs. There are also many national companies that will help you recycle your computers and other old electronics.
Look for companies that recycle on the Ultimate Green List: http://www.theultimategreenlist.com/directory/recycling.