The refrigerator is one of the biggest energy users in a kitchen. To help reduce the amount of energy your refrigerator uses, you should move your refrigerator out and vacuum the coils on the back. Dusty coils on the refrigerator make it less energy efficient and let's be honest, nobody looks back there so dust tends to build up and collect on the coils. You don't need to do this often, once a year will suffice, but if you do this your refrigerator will more efficient and will run less.