Work Out... or Sleep on It

Everyone tells you that if you're serious about losing weight, dieting alone isn't good enough. You have to get off the couch and start shaking that booty.

Calculated on a per-hour basis, climbing stairs will melt fat the fastest -- 800 calories. Running is next at 692, with cycling burning just over 500, according to researchers at Montana State University-Northern.

Of course, if all that exercise sounds like too much, you can always sleep on it. Even dozing burns 55 calories an hour.