Check out the Dietary Guidelines for Americans. Published every five years by the U.S. Department of Health and Human Services and the U.S. Department of Agriculture, these guidelines can help you build good dietary habits that can reduce your risk of major chronic diseases. http://www.cnpp.usda.gov/DietaryGuidelines.htm
Explore some sample eating plans. These plans—the USDA Food Guide and the DASH Eating Plan—help you figure out how much of each food group (e.g., fruits, vegetables, grains, meats) you need to be eating each day.http://www.nhlbi.nih.gov/health/public/heart/obesity/wecan/eat-right/sample-plans.htm