Lock your windows to reduce drafts. Put blankets or pillows in front of draft door bottoms. Dust heat registers and radiators regularly. Close dampers and flues in woodstoves and fireplaces when not in use. Use ceiling fans to move heat accumulating at the top of the room to a lower level.
Most fans have a switch used to reverse the direction of the air flow.
Install a programmable thermostat for easy control of the temperature settings in your home. Remember to change filters every month, more often if you have pets or an unusually dusty environment. It Have an annual system tune-up of your heating or air conditioning system for optimum performance. Replace older appliances, heating or air conditioning units with newer, more energy-efficient ones. Finally, remember that our bodies don't regulate as well as we age.