Colin Armstrong, Ph.D., is director of health psychology services at the Vanderbilt Dayani Center for Health and Wellness at Vanderbilt Medical Center in Nashville, TN. His work has been published in a variety of professional journals, and he is a frequent speaker at conferences and corporate events. Colin regularly teaches workshops and seminars on the topics of medication adherence, exercise motivation and adherence, stress and worry management, and developing a more positive attitude. He can be reached at Colin.Armstrong@Vanderbilt.edu or (615) 343-2808. For a complete list of references used in this article, please contact him.