Article from Retrevo's Survival Guide to Greener Living with Electronics:

Saving a few watts of power here and there is not going to make a huge difference in your monthly energy bill but if everyone shaves a few watts off their power needs the benefits could be substantial. That said, the amount of power a gadget uses is only a small piece of the puzzle. Many other features and factors contribute to making a product green. Here’s a list of some of them: 

From Retrevo.com, here's a list of some things you may not have known about gadgets and the environment.

In honor of Earth Day, Retrevo, a site specializing in consumer electronics info, put together a PDF guide with a lot of good info about the environment and electronics.  Here are some tips from Retrevo's guide on how to be greener when using your electronics: