One easy way to cut down on your home energy use: replace your incandescent bulbs with compact fluorescent bulbs. CFLs need far less electricity to produce the same amount of light as their incandescent counterparts, and as an added bonus, they last much longer, too. You can read more about them here and here.
I held out against CFL bulbs for a long time, erroneously associating them with the unpleasantly harsh light cast by standard-size fluorescent bulbs. Yet when I finally installed 23-watt (equivalent to 100-watt incandescent) n:vision CFL bulbs in my bathroom and bedroom last week, I was pleasantly surprised. The bulbs give off a warm, buttery light — just as good, if not better, than their energy-sucking predecessors.
Major retailers like Home Depot and Wal-Mart now carry compact fluorescent bulbs, as do many neighborhood drugstores and grocery stores. Alternately, you can search for a store near you using Energy Star’s store locator feature.