Prev2 of 5Next Energy-Efficient Cooking Techniques Use lids on pots to retain heat, cook with smaller appliances like microwaves or slow cookers, and match pot sizes to burner sizes to avoid wasting heat. Preheat the oven only when necessary and consider batch cooking to maximize energy use. Prev2 of 5Next Energy-Efficient Cooking Techniques Post navigation Install a Programmable Thermostat