Eating Ramen

Free Energy!

In the summer, lower your window shades and close your blinds to keep your home cooler. Spend more time in cooler rooms, typically on the north side of the house.
In the winter, open the shades and blinds during the day to let the sun provide heat.  Of course, this assumes your windows are strong and well-sealed.  If not, consider using duct tape to tape up windows and doors that are leaking in cold air.
Use the light to your advantage too. Try to be awake when the sun is up, using natural sunlight instead of artificial lighting as much as possible. Natural light is free.  Light bulbs use electricity. This may mean you need to get up earlier and go to bed earlier.  (Think back to the days before electricity.  People had to time their activities according to the sunlight.)  And of course, remember to turn off the lights and unplug electronics when you leave a room.  It saves electricity and that saves you money on your electric bill.