re: No discipline when it comes to food.

I reject any "willpower" arguments that torture your body. The thing I think people neglect is that cravings are accurate. It is no different than being thirsty after exercise. Elevated stress hormones like adrenaline or estrogen can cause salt or sugar craving for example. A good example of this is pregnant women, there is no doubt about their nutritional deficiencies causing cravings because they are literally eating for two. The problem is we train our bodies to seek suboptimal foods (Pizza = glucose). The way I dealt with cravings is understanding the major things my body needs and being well fed in those things. Getting rid of foods that also lead to insufficient absorption of nutrients helps too.