My personal opinion is that the neutral position on the mood spectrum—what I called emotional sea level—is not happiness but rather contentment and the calm acceptance that is the goal of many kinds of spiritual practice.

I tried to change the conventional paradigm, for example, by insisting on the reality of mind-body interaction, by stressing the importance of natural therapies, by focusing attention on lifestyle issues, by looking at worthwhile aspects of alternative medicine. Many people have been threatened by that. Doctors especially tend to think that they know everything about the human body, and don't realize that medical education has really omitted many very important subjects.

Limit or eliminate late-night computer and television viewing. A computer or TV screen may seem much dimmer than a light bulb, but these screens often fill your field of vision, mimicking the effects of a room filled with light.

Remember that breath walking - as with any meditation technique - should not be pursued with a grim determination to 'get it right.' The point is to cultivate openness, relaxation and awareness, which can include awareness of your undisciplined, wandering mind.

Another very common use, in all cultures, of psychoactive substances is to give people transcendent experiences. To allow them to transcend their human and ego boundaries to feel greater contact with the supernatural, or with the spiritual, or with the divine, however they phrase it in their terms.

I'm still not comfortable recommending that people eat saturated fat with abandon, but it's clear to me that sugar, flour and oxidized seed oils create inflammatory effects in the body that almost certainly bear most of the responsibility for elevating heart disease risk.

Short naps are good. Given modern workplace demands, this is not possible for many people - but if you have the option, try napping for ten to twenty minutes in the afternoon, preferably lying down in a darkened room.