This section is on the physical foundation of happiness (and health). It is worth noting that any discussion of the body and mind as separate is an incomplete treatment. But for the sake of organization we will focus here on nutrition (and chemicals), exercise, and sleep.
The Happiness PhD Project: Happiness Encyclopedia
NOTES
Happiness is partially determined by genetics (perhaps 30-40%).
Exercise is as, if not more, effective than antidepressants.
Day-time light and night-time dark support mental health.
Healthy eating seems to support happiness.
Ownership (empowerment) and positive emotion support physical healing.