The wonderful people over at beachbody.com (where I am an independent coach- teambeachbody.com/FrancesK) have posted on their website a food guide called "Michi's Ladder". The basic idea is that foods are grouped into five different categories based on their nutritional value. Each step of the ladder indicates a level of nutritional "goodness"... the goal is to move from whatever category you fit into up to level one.
Here's a link to Michi's ladder for you to check out. It also lets you know whether a food is a protein, carb or fat. I find it VERY useful when grocery shopping and I think you would, too!