Check out this article from Sojourners Magazine on 10 easy ways to use less energy around your home.
Here's my favorite:
If every American unplugged their TVs when not in use (or put them on a timer or power strip that they can easily turn off) we would save 9 billion - yes, billion - kilowatt-hours of energy. Modern TVs constantly draw power to keep the tube primed to turn on instantly. Hook your TV to a timer that gives it power when you first would normally use it and cuts power at night. (For instance, we watch the news and occasionally late-night TV. Our timer turns on power to the TV from 7 p.m. to 1 a.m., cutting power for nearly 18 hours of the day.)
As we talk about energy bills knocking around Congress, it is helpful to remember the power (pun intended?) that we have in our own hands.