One of the ways to start optimizing your heating and air conditioning system is to change to high efficient equipment.
Most ducting systems have fiberglass insulation with a R4 rating, or less. This results in a heat loss through the walls of the ducting. This causes higher energy to be higher because the furnace has to run longer and harder to satisfy the thermostat.
The cure... A correctly sized, thickly insulated, and well sealed duct system.