Next time you're in the local library, check out a "Cut the Carbon" kit - and do some homework.
All 235 New Hampshire public libraries now have ready to lend, at no cost, home kits that come with a Kill-a-Watt energy detector, which can be used to assess the efficiency of your appliances and reduce their usage (with instructions on how to use it!), a worksheet that helps you calculate the energy costs associated with each device, as well as tips and advice to cut costs even further.
No library in your town? You can borrow a kit from the State Library in Concord (271-2392).