Check out this website for an interesting discussion of happiness. If you register (free) you can take a variety of happiness questionnaires and compare your results to those of various demographic groups.
I particularly appreciate the concept of “positive health,” which is simply another way of saying that health is more than the absence of disease. Similarly, Dr. Seligman advocates “positive psychotherapy” – the idea that psychotherapy should not only alleviate depression and other woes, but should also increase well-being and happiness.
These ideas are well worth checking out for professionals who advocate a holistic approach to healthcare and for individuals seeking a more balanced life.