We really can "Change the World" with just one light bulb.The key is that the more people that take this step,the more we can change the world.Don't leave lights on when no one is in the room.If you are going to be out of the room for more than five minutes,turn off the light.
If you know of a light that everyone forgets to turn off,make a sticker or a sign to hang next to the switch that says "Lights Out!" or "Don't Forget!" Where possible,use compact fluorescent light bulbs.Those funny-looking bulbs produce the same amount of light by using 1/4 of the electricity.Plus,they last for years and years without burning out.
Turn off the TV when no one is watching it.The same goes for computers,radios and stereos - if no one using it,turn it off.Turn off all the appliances at the surge protector/control strip - that four- or six-plug extension chord that you plug all your computer things into.Some devices,like modems or other networking boxes are drawing small amounts of power all the time.Check with your folks first,but the best thing to do is turn them ALL off at the surge protector.