Reducing junk mail is a painless way to reduce your carbon footprint. YellowPagesGoesGreen allows you to stop delivery of telephone books. We use them almost never, Reduce comes before Recycle. Catalog Choice provides the same service for catalogs.
It seems the Wii is the most environmentally friendly of all the gaming consoles. However, if you turn off the others when not in use, they are not too bad.