Revise improvements based on this discussion. Go back over recommendations for improvements. All of the items listed in the survey are relatively low cost especially when one considers the savings resulting from the reduction in energy cost. The only two items which would be somewhat costly are insulation and ceiling fans. Even these two recommendations would pay for themselves in very little time.
Hot water is needed to wash dishes and for baths and showers.
Install a flap valve on the inside of your hot water tank. Turn water heater off if you leave for more than two days. Weatherstrip and caulk exterior doors and windows.