reasons you're hungry

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The habit that saves you time.
What makes you hungry: Eating at your desk may seem efficient, but research published in the American Journal of Clinical Nutrition shows that when participants were parked in front of a computerized card-sorting game with snacks for a 30-minute period, they ate twice as much as those who weren't at a computer. They also remembered less about what they ate, so they were more likely to snack excessively as the day wore on.

What to do: Because formatting spreadsheets can be as much of a distraction from your lunch as computer solitaire, try to take at least 10 or 15 minutes away from work in order to focus on your food.