While many are obvious, such as "Turn Off the Console When Not in Use" when used in conjunction with tip number two ("Buy a Wii") you'll find yourself saving the planet at an amazing rate. I think you get me.
What you might not be aware of is a tip targeted at PlayStation 3 owners. Discovery notes that watching a Blu-ray movie on your console sucks up "5 times more power than watching it on a standard Blu-Ray player." Now I really feel guilty for watching Planet Earth.

Go on, be the annoying guy who forwards this to your electricity cavalier buddies. They'll thank you for it!
http://kotaku.com/5124628/discover-f...en-your-gaming