If you or someone you love isn't living up to his or her potential -- and suffers from even one or two of the above feelings -- here is a program that can help. Your Own Worst Enemy is the first book devoted to the problem of adult underachievement, a problem stemming from common behavior patterns that can manifest itself in almost every walk of life -- from twentysomethings stuck in dead-end jobs to outwardly successful businesspeople who can't help feeling they've missed their true calling.