Plan meals that can be cooked together in the oven all at once to make full use of the energy it takes to heat your oven. Avoid opening the door when baking as taking a peek only wastes energy. Microwave cuisine is faster and more efficient than conventional cooking. If possible, unplug electronic devices and chargers that have a block-shaped transformer on the plug when they are not in use. For computer scanners, printers and other devices that are plugged into a power strip, simply switch off the power strip after shutting down you computer.
Dirty filters restrict airflow and increase energy use.
Keep you furnace clean, lubricated and properly adjusted. Install a programmable thermostat. If you have a heat pump, select a model designed for heat pumps. Plug your home's leaks. Install weather-stripping or caulk leaky doors and windows and install gaskets behind outlet covers.