Natural foods, exercise and enthusiasm.

That's all you need.

http://hippocratesinst.org/html/articles_the_mind.htm

Our discombobulated thoughts create discombobulated bodies. We must always recognize that it is not only our brain cells that make things happen but also our body cells are ready and able at any given moment. Back in the twentieth century we taught people to sit, contemplate and reflect -- in the twenty-first it demands we create, achieve, and accomplish.

...Recently I read an interview with an eighty-year-old Charles-Atlas-type man who looked decades younger. When asked his secret, he said it was simple; raw foods, exercise, and an endlessly inquisitive desire to reach the excitement of tomorrow. Find your way back to yourself and give yourself the gift of a body that can lift and excite you.