Covey, Stephen R. The Seven Habits of Highly Effective People: Powerful Lessons in Personal Change. New York: Simon & Schuster, 1989. Unlike most "self-help" books that are based on surface changes to one's outward character, Covey argues in Seven Habits that true personal development must be modeled on what he calls "correct principles." Covey demonstrates that an effective and fulfilling life is based on making thoughtful changes to one's own actions and then directing those changes out to one's sphere of influence. Covey's model is no "quick fix" solution; instead he takes the reader step by step through the arduous journey of making a life. Seven Habits is a thoughtful reflection on the gradual and never-ending process of self-improvement and refinement that includes helpful exercises.