If you live in Austin and have an account with Austin Energy, you should totally sign up for the Austin Energy PowerSaver program -- all you do is give them your contact information and agree to conserve energy between 4:00pm and 8:00pm when they contact you (which will be up to ten times during the summer). For that you get a nifty kit including: weather stripping, outlet sealers, two compact fluorescent bulbs, and a nightlight. For free! I just got mine, and am currently enjoying the energy efficient glow of my first compact fluorescent bulb. Don't you like free stuff? And conservation? Of course you do.
Now turn off that light.