Keep the oven door closed: Every time you open the oven door, heat escapes, and the oven has to use more energy to get back up to the desired temperature. Try to avoid opening the oven door unnecessarily. Use the right burner: When cooking on a hob, use the right-sized burner for the pot or pan you are using. A small pot on a large burner wastes energy. Clean your appliances: Regularly cleaning your appliances helps to keep them running efficiently. Dust and debris can reduce the airflow in your oven, making it work harder and use more energy.