They cost more to buy, but much less to run, than conventional incandescent lightbulbs. Here's what I mean. But since the compact fluorescent uses roughly a quarter the wattage, you'll more than make up the initial cost difference on your electric bill. Cook up savings in the kitchen. If you have a microwave oven, use it for as much of your cooking as you can, particularly in hot summer months.
Microwaves consume less energy than conventional ovens and give off less heat.
Pressure cookers and toaster ovens are also more thrifty than full-size ovens. The stove top is more efficient than the oven, too. Don't overdo the preheating. According to Con Edison, the New York City area utility, any food that takes more than an hour to cook will do just fine if you start with a cold oven. Finally, fight that urge to peek in the oven.