I would start with simple changes.
Walk, or do other exercise, for at least 20 minutes a day, at least 3 times a week.
Make sure that you are drinking enough water, at least 8 8oz glasses a day.
Eat an apple or big pile of veggies before meals.
Eat 7-8 servings of fruits and vegetables a day, in at least 3 different colors.
Eat 6-7 servings of whole grains a day.
Replace meat and dairy with bean, lentils and tofu
at 12:42 PM on Jul. 29, 2009