Winterize Your A/C and Water Lines

This one's really easy, and it will even save you a few pennies next summer, too: Simply drain any hoses and air conditioner pipes, and make sure you don't have excess water pooled in equipment. If your a/c has a water shutoff valve, go ahead and turn that off.

Similarly, make sure any hoses are drained and stowed away neatly. Turn off exterior water spigots. It's also a good idea to seal any water leaks around the place -- and don't forget to remove any window A/C units and store them so you don't invite cold drafts all winter.

If you're in the market for a new air conditioner, the federal government will reimburse 30% of the cost for an efficient central air system, up to $1,500.