28. Wash the car weekly.

If you don't own a car, wash anything thoroughly in your home once a week -- a floor, a couple of windows, the shower stall or bathroom tile. Cleanliness is not only next to godliness, but it can also be a way to balance a sweet tooth. A 150-pound person who sports rubber gloves and exerts some elbow grease will burn about four calories for every minute spent cleaning. Scrub for 30 minutes and you could work off approximately 120 calories, the same number in a half-cup of vanilla frozen yogurt. If you want to top your yogurt off with a teaspoon of chocolate sprinkles, scrub-a-dub another five minutes.

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Learn more about Boston University's Nutrition Programs.