I wouldn't worry about it if they need notice, but definitely try and cut back on electricity usage. Stinky has the right idea, although I'd also suggest lowering the coldness on your refrigerator. Also, if you make sure to stock your refrigerator and freezer, it actually uses less electricity because it doesn't turn on as often.

If you have a laptop, use that instead of your desktop when possible.

Basically, just do the opposite of what most people do when they have an apartment that includes utilities.