General cooking tips
Microwave Tip : Microwave ovens use around 50 percent less energy than conventional ovens; they're most efficient for small portions or defrosting. For large meals, stovetop cooking is usually more efficient
Oven Tips : Check the seal on your oven door for wear. Even a small tear or gap can allow heat to wander away from your meal. A clean seal also provides better heat retention.
Kitchen Tip : Match the size of the pan to the heating element; more heat will get to the pan and less will be lost to the surrounding air or found by the pan handle! A 6-inch pan on an 8-inch burner will waste over 40 percent of the energy.