Change your light bulbs to LEDs.
Wash your clothes in cold water if possible.
Use natural light when possible.
Defrost your refrigerator and freezer before ice buildup becomes 1/4-inch thick to ensure your appliances are running efficiently.
Control your fixtures with a photocell or a timer to assure dusk-to-dawn only operation of your outdoor lights.
Don't leave your electronics on all day long. Only turn on your computer, monitor, printer and fax machine when you need them.
Refrigerators and freezers actually operate most efficiently when full, so keep your refrigerator and freezer as full as possible (using water bottles if nothing else). Be careful about overfilling them as this will reduce airflow and cause the appliance to work harder.
Turn off heated dry on your dishwasher and air dry instead.
Set your refrigerator temperature to the manufacturer's recommendation to avoid excessive cooling and wasting energy.
Don't leave bathroom or kitchen ventilation fans running longer than necessary. They replace inside air with outside.
Replace your windows. If your home has single-pane windows, consider replacing them with more energy efficient windows, or adding solar shades or tinting film.
Install a programmable thermostat that will automatically adjust the temperature according to your schedule.
Turn off the lights when they're not in use. Lighting accounts for about 12% of a typical residential utility bill.
Don't leave your mobile phone plugged in overnight. It only takes a couple of hours to charge.
Turn off the oven a few minutes before cooking time runs out. Your food will continue to cook without using the extra electricity.
Watch your appliance placement. Avoid placing appliances that give off heat, such as lamps or TVs, near a thermostat.
Dress for the weather. When you're at home, dress in warm clothing in the winter and cooler clothing in the summer to stay comfortable without making your heater and AC work harder.