Turn off all lights. Buy night vision goggles. Replace heaters with burning bins of garbage. It's a known fact that turning your car on and off uses more energy than simply leaving it running. Never turn your car off.
Static electricity is an under-appreciated form of energy.
Get a bunch of balloons to rub on your hair to power small appliances. On laundry day, take your clothes down to the river and beat them on rocks. On bath day, take your children and pets down to the river and beat them on rocks. In the summertime, replace air conditioners with the cool, soothing tones of Barry White. Turn the water off when you're masturbating in the shower.