When finances got tight and the electric bill got really high last year, I put power strips on all my TV's, Computer, DVD players, Stereo's etc. At night I flip the power strip off. It made a HUGE impact on my electric bill. I didn't realize anything with a remote control always stays powered up. So at night - a good 8 + hours only my refrigerator and alarm clock were using power. I kept things off during the day while at work too. It really helped.
I was also recently told that you should unplug your cell phone charger when your not charging. It too pulls power even when not in use.