The refrigerator is one of the biggest energy hogs in the house, so it's key to make sure it runs efficiently to save electricity and money. If you don't use your automatic icemaker often, consider turning it off. A study by Time magazine found that the average icemaker increases energy usage by 12 to 20 percent. By simply turning it off, you'll significantly improve efficiency. Want ice? Consider filling silicone ice cube trays with water and using them instead of an automatic icemaker.

Whether flying by plane or driving by car, the weight of your luggage can have an impact on overall fuel efficiency. The heavier your bags, the more fuel planes and cars have to use to transport you. So pack light and leave things like hair dryers and extra pairs of shoes behind at home. And toss in a reusable water bottle and lightweight reusable bag; the water bottle can be filled with filtered water at the hotel gyms or at airport water fountains, and the reusable bag can be used when you pick up souvenirs or basic supplies from local stores.

Everyone loses socks. So what do you do with the stray single sock you have left? Don't toss it -- you can reuse it around the house! Fill a sock with cedar shavings, tying it off at the top; since socks are porous, the cedar scent will permeate the air inside a closet and keep moths at bay. To keep your car windows from fogging up, fill a sock with kitty litter, and tie a knot at the end. Place it by the window, and it'll absorb excess moisture, keeping your car windshield crystal-clear.