7. Seal and Insulate

A well-insulated house reduces the amount of money you will spend on heating and cooling. Start by checking out your attic. If your attic is unfinished, you shouldn't be able to see the floor joists. If you can see them, add more insulation.

Also, be sure to fill in and seal any holes in your exterior walls, such as where pipes come into the house and around windows and doors. Wrap your hot water heater and exposed pipes with insulation to help them maintain the proper temperature.