anything pre-made is bad...
go to a grocery store, anything that is cooked, packaged or made on site is bad for you. Avoid carbohydrates after 1pm. this includes fruits.
Chicken breasts...fish....and all of the green vegetables you want. Eat fruit too but avoid eating it late in the day. Aside from that if you stick to that your body will detoxify the heck out of itself.
Drink 8 glasses of water a day at a bare minimum. Its not hard to conceptualize, but difficult to stick to.