Now that it's summer, most of us start thinking about keeping our electric bill in bounds!One way to do that is to keep your refrigerator and freezer, if you have one, running efficiently.Be sure to vacuum the condenser coils on your refrigerator at least once a year. You may have to pull your appliance out from the wall to do this, but when the coils are dusty, it keeps the fridge from cooling efficiently.If you have an older fridge, check the door gaskets to make sure you have a tigh.