Yep, that sounds pretty much like what I'm trying to do now. In fact, I think I'll copy this into my lj :)

The foods that make me FEEL bad is definitely an important point for me. I've known for years that anything really high in fat makes me feel horrible. Now I'm learning that anything really high in carbs also makes me feel horrible. Recently I ate a very sweet dessert. The next morning I was physically ill. I'm not likely to make that mistake again any time soon.