When watching what you eat, know what's a portion and what's a serving. A serving is what's shown on the Nutrition Facts label. But a portion is how much of that food that you consume. For example, if you eat a 5 ounce bag of cookies, your portion is one bag of cookies, but there could be 2 or 3 servings in that bag. To add flavor to your food without adding fat and calories, you should...