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Learn Portion Control
You need to know how to eyeball servings. Most people overestimate, and that can lead to trouble. Keep in mind that a serving of meat, poultry or fish is three ounces—about the size of the palm of your hand or a deck of cards. Two servings of rice, pasta or other grain-based foods is the size of a baseball or your fist. A serving of fruit is a piece of fruit that's about the size of a tennis ball, and a serving of vegetables is 1/2 cup, or half a baseball.