Below are few steps that can be useful to improve the performance and efficiency of heat pump.
Change air filter :
Fix duct leak.
Service your pump on regular interval.
Use programmable thermostat.
You should also have a professional technician service your heat pump at least every year. The technician can do the following:
-Verify correct refrigerant charge by measurement
-Check for refrigerant leaks
-Inspect electric terminals, and, if necessary, clean and tighten connections, and apply nonconductive coating
-Lubricate motors, and inspect belts for tightness and wear
-Verify correct electric control, making sure that heating is locked out when the thermostat calls for cooling and vice versa
Verify correct thermostat operation.