Try some of the exotics like bulgar, kasha and quinoa. Eat a variety of vegetables. Although citrus fruits and cruciferous vegetables have the best reputation, this is largely because they are the most widely studied. Look for ethnic cookbooks to find new ways to prepare vegetables that taste great. Eat more fruits.
Fresh fruits make great snacks and desserts.
Include more herbs and spices in your cooking. Although we use these in small amounts, many are rich in phytochemicals. Decrease the portion sizes of meat, fish and poultry. Every year the evidence points to the fact that our diets contain too much animal protein. We don't have to be vegetable-phobic.