Stephen Covey's leadership training book is widely recognized as one of the best-selling business books of all time. That's funny, because there is very little in it about business or management. Instead, the book is a tour de force on confidence building packaged into seven easily digestible maxims. There is good advice throughout that could help you in your professional life, but that wasn't among Covey's obvious intentions. The fact that the seven "habits" overlap and aren't all that revelatory — No. 2 boils down to focusing on your goals — hasn't seemed to blunt the book's continuing popularity.