According to one book I read, carbs - even "white carbs" - are ok if they are eaten with protein, which slows down the glucose process. The protein slows down and neutralizes the carbs. In this theory, pasta with lean meat sauce would be better than pasta with a light tomato or cream sauce.
I just do in moderation...I eat what I can put in the palm of my hand...which isn't very big. I'm beginning to believe that's the best rule of thumb...And as for firming up my body, I can load on the protein.