AS WE BEGIN another year, many of us go through the traditional ritual of making New Year's resolutions, and it always seems that many of our resolutions are directed toward improving our health. It is always an interesting phenomenon that gyms are so crowded the first two weeks of January and diet centers tend to have an overflow of people enrolling in various programs to lose weight. I'm sure that sales of pedometers and walking shoes skyrocket too, as we all try to take better care of ourselves and, for many of us, as we try to undo some of the negative health behaviors in which we engaged at the end of the previous year.