You've got to set yourself up to be as healthy as you can. The thing we tend to do is when it gets to be a bit too hard we actually opt out for the absolute worst option. For example if you're in a rush in a morning and you feel like you don't have time to make breakfast you skip it.
No architect troubled to design houses that suited people who were to live in them because that would have meant building a whole range of different houses. It was far cheaper and above all timesaving to make them identical.