It's time to upgrade your thermostats with ones that have timers. Raising the temperature setting (during summer months) or lowering the temperature setting (during winter months) in your home during peak weather by 1 degree will save energy consumption by approximately 8%.
Consider a digital set-back thermostat during unoccupied hours. During air conditioning season, raise the temperature slightly after midnight and automatically lowering it prior to your every-day wake up time. During heating season, lower the temperature slightly after midnight and automatically raising it prior to your every-day wake up time. Your home or office HVAC efficiency will increase significantly and savings will add up continuously throughout the year.