Turn lights off when leaving the room. As silly as this may sound, it actually saves alot on using unecessary energy. If you get in the habit of doing this daily, you will notice a difference on your electric bill.
Turn the computer off when not in use and unplug it. Even if you are not using it, the computer uses alot of energy.
Use natural light. Don't you like the sun? If you turn off the lights when you first wake up and let the sun in, you will actually feel better. You will really feel much better when you see your electric bill start shrinking before your eyes. Try it out. It wont cost you anything to try but it will cost you if you don't try. :)