habits that cause you to gain weight

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You Watch YouTube Videos at Your Cubicle

Why it packs on pounds: Unless you're that guy, you're probably viewing with headphones in, which drowns out the sounds you make while you eat. Being able to hear yourself chewing and crunching reduces the overall amount of food you eat, suggests research in Food Quality and Preference, likely because it makes you more aware of just how much you're eating.

The fix: Save the headphones and videos for short breaks when you're not noshing. Instead, do the thing you're always being told you should do and try to pay attention to your food while you're eating.