16. You’re careful when you buy your snacks, less so when you serve them.

Result: Healthy choice made, unhealthy quantity consumed

Here’s the scenario: 94% fat-free microwave kettle corn saves you 6g of sat fat over the full-fat variety. But a typical, not-very-big bag contains 2 servings of about 3 cups each. Said handy bag often joins the eater on the couch for a movie, and soon it’s empty. It’s just human nature to eat what a container contains.

What to do: Choose that healthier snack—and eat it in measured amounts.