Drafty windows aren't the only way air leaks into your home. Your outside walls may have some even bigger holes to worry about. Outlets on the exterior walls of your home can be big energy wasters. But air leaking through these holes can be easily sealed. To do that, turn the power off, remove the outlet or light cover plates and install inexpensive foam gaskets. This will seal out drafts and stop energy dollars from leaking right out of your wallet.