9. You consider fruits like bananas and apples “free.”

Result: You’re eating better—but may be taking in more calories than you think.

Last year, Weight Watchers changed its famed point system to make fruit “free”: Dieters can eat as much as they want without eating into their precious daily points. WW’s rationale: It encourages eaters to swap in more healthy low-calorie foods.  Fine print reality: Nothing with calories is really free.

We’re not dissing fruit. A nutrient-rich banana only has about 105 calories. An ounce of baked chips has about 120. Swapping one for the other is a good nutrition deal. But simply adding fruit will, in the long run, add up, calorie-wise.

What to do: Focus more on healthy food choices, less on calories, but be mindful that no food is “free.”