Keep it clean: Keep the drains and intake grates clean. Any blockage will require the pump to work harder. Backwashing will help keep the filter clean, but be sure to not do this too often, as this can waste water.
Out with the old, in with the new
Your refrigerator uses the most energy of any appliance in your home if you consider that it runs 24 hours, seven days a week. According to ACEEE, there are 126 million refrigerators and 38 million freezers using 200 billion kWh a year.