I read this book:
http://www.michaelpollan.com/indefense.php
Highly recommend it.
The basic jist:
Don't listen to the dietician, supplement, food industry on what to eat. They don't use a holistic lens of analysis and therefore you get a scattershot approach to healthy eating.
Don't eat anything your Great Grandma wouldn't recognize as food. (basically any and all processed foods)
Do eat lots of vegetables, alot of grains, and not alot of meat.
Voila, healthy eating.