I recently read a hint on cutting down on the heating bill.
First you need to take a look under your switch plate and outlet covers. No insulation? Than you have cold air leaking in from outside. Espically if an outlet is located on an exterior wall, thus driving your heating bill up.
To plug the draft, insert foam insulated gaskets in the outlet and under switch plates. For outlet covers, buy those child safety plugs to ensure a leaky proof seal!!
I was amazed to find how many I had to seal up in the old trailor I am renting. But not surprised.