Variety:
Eating a wide variety of foods helps to ensure meeting all of your essential nutrient needs. Eat an assortment of foods within each and every food group.
Moderation:
Too much or too little of any nutrient can be harmful. Good nutrition means eating "not too much, not too little, but just right."
Balance:
There are no good foods or bad foods. A balanced diet meets all essential nutrient needs while maintaining a healthy weight.