Nachos are where portion control goes to die. After all, says registered dietitian Holly Herrington, who has ever just scooped one chip into that mound of meat, cheese and sour cream and said, "I'm done now?" An entire platter of nachos can yield more than 2,000 calories. Even if you split that with a friend, you're still getting 1,000 fat-filled calories. "The mozzarella sticks are not a great choice, but four sticks have only around 500 calories," says Herrington of the Center for Lifestyle Medicine at Northwestern Medical Faculty Foundation. To lighten up nachos at home, make them with baked chips, skip the beef and opt for low-fat sour cream and cheese.