The geometry of eating right has changed. The food pyramid, which underwent a confusing makeover a few years ago, has now become a circle in the form of a plate. This version is much more user-friendly than previous versions - because it's the shape of our serving dishes. The plate is divided into four sections of differing sizes - the smallest is devoted to proteins, such as meat, beans and tofu. The next-smallest spot belongs to fruits, and grains get a nicely sized spot. Vegetables grab the biggest area of the plate, and a full half of the plate is shared by veggies and fruit. Off to the side is a smaller serving of dairy, which can take the form of low-fat milk, cheeses or yogurt. The new guidelines also include advisories about sodium, portion control and other means of healthy eating.