By far the most energy used in your home goes to heating. By spending a little money and time you can clash your home heating costs. Below are some links to products that can help you save money on home heating costs.
#1 Install a digital thermostat, and make sure temperature sensor isn't near a drafty window.
#2 Buy and install a Weather stripping kit for doors
#3 Add extra insulation to your attic and home.
#4 When last did you change your furnance filter?
#5 Regular fireplaces are very inefficient, insall an insert to convert a fireplace into an effective heating system.