Almost no one as I think most leadership books are a joke. They are, as I note in Leadership BS, frequently based on wishes and hopes rather than reality, on inspiring stories rather than systematic social science, and on "oughts" rather than "is."

Possibly the biggest issue, however, is that performance appraisals focus managers attention on precisely the wrong thing: individual people. As W. Edwards Deming, the father of the quality movement, taught a long time ago, company performance often results more from variations in systems than from the individuals doing the work.

People need to be ready to have truly "global" careers. Just as companies now face world-wide competition, so, too, do people. Therefore, individuals need to get out in the world more - some large percentage of Americans don't even have a passport - and work in different countries.

Everyone faces defeats, setbacks, reversals of fortune. But just like water wearing away rock, persistence triumphs. Resilience is one of the most important qualities I would look at in trying to predict who is going to be ultimately successful.

Leaders are not modest, and more importantly, the extensive social science research on narcissism, self-promotion, and similar constructs shows that these qualities and behaviors are useful for getting hired, achieving promotions, keeping one's job, and obtaining a higher salary.

I don't think eliminating the knowing-doing gap depends on the amount of knowledge around. It depends much more on people's attitudes and intentions - do they actually want to turn knowledge into action, or just go through the motions of acting as if they are busy or are accomplishing something.

Take care of your customers, and you will have a successful business. Don't, and you won't. The airlines need to figure this out - soon.