The biggest mistake most people make is not properly using their thermostats. The first thing to do after you install it is to program it for morning afternoon and evening. Set it to be 70 or so as you sleep so that you are comfortable. Set it lower during the morning and afternoon - especially if the house is empty due to work and school schedules so that energy is not wasted. If you also have central air or a programmable AC, the same applies. This is a major ticket to a lower electric bill.
