Yesterday, Cool Tools highlighted an inexpensive electric power usage meter called Kill-A-Watt. This product, which costs less than $30 at Amazon.com, has the potential to save you hundreds of dollars a year if you identify appliances and other devices with higher than necessary electrical usage, limit their usage, and eventually replace them.
At my house, we have an old Gibson Frost Clear Refrigerator / Freezer. This looks like a potential power hog to me, but who knows? Any appliance that comes from an Energy Star-rated product group, but isn't Energy Star-rated itself is a potential source of significant savings.
We also run a number of computers on a 24/7 basis here at The Home Office. How much are we spending to keep them running annually? I have no idea, but with a Kill-A-Watt power usage meter, I will soon find out.