Mistake: Pouring out of large packages

Family-size packages might save you money, but they're also dangerous for your belly. Five studies with 691 adults across 48 product categories show that people pour more out of larger packages, says the Food & Brand Lab. Large package sizes increase consumption an average of 22 percent. Why? Because people subconsciously think that cost is cheaper in large packages, so they're more generous with their servings.

Credit: Flickr/Martin Cathrae