It's easy to make food choices that are healthy and wise, provided you can make sense of the info on the side panel. So we handed a box of your typical breakfast cereal to New York City-based nutritionist Dana Winter, R.D., for a dissection. Serving Size This is the size of the portion on which the nutritional information is based—be it two cookies or a cup of cereal. For the most accurate accounting of what you personally consume in calories, etc., compare the size of the typical serving you eat to the one stated on the label by measuring and weighing portions. Compare brands by first…