Because you’re sexy, you don’t waste anything — especially food. Right now you have at least one container of leftovers in your fridge waiting for round two with your palate. Whether you brought food home from a meal on the town or because you cooked more than you could eat last night for dinner, use your microwave, not your oven or stove to reheat. Microwaves use less than half the power of a conventional oven and cook food in about one-fourth the time. Toaster ovens and slow cookers are also a great way to cut energy use in cooking, but the microwave is still the energy conservation winner in the kitchen.