In fact, more than half of all U.S. households now use microwaves. Here are a few simple tips about stoves and ovens. They're most efficient for small portions or defrosting. For larger items such as turkeys, microwaving is least efficient. For soups and stews, crock pots are efficient.
Pressure cookers are considerably more energy efficient than regular ovens.
When you open an oven door during cooking, you lose 25 to 50 degrees or more. There's a good chance it doesn't. Check the reflectors under your stovetop burners. The cleaner they are, the better they'll reflect heat. If you need new ones, buy quality.