If you spend evenings camped out on your sofa staring at the boob tube, take note: People who spend four hours or more in front of the TV are twice as likely to be overweight as those who watch less than an hour a day, a new study from Australia reports. Study participants' body-mass index (which measures how much of your weight is fat) increased for every hour of TV time. If you watch two hours a day, you're 57 percent more likely to be overweight than those who keep tube time to an hour or less; if you watch three or more hours, you're 91 percent more likely to be overweight. What's worse, past studies show that this pastime triggers the munchies for high-fat snacks, though researchers aren't sure why. If you must gaze at the box, channel your snack urges toward something healthful, like this creamy, low-fat dip.