Any doctor would recommend most of those as well. The effects of exercise and reduced stress on overall health are very well documented, along with the effects of eating properly.

Of course, that's not going to accomplish anything if my immune system has decided to destroy my thyroid gland, or if a stray gamma ray or two has turned a lump of otherwise-useful tissue into a malignant tumor, or if my breathing passages are shaped in just the right way to obstruct my breathing at night.