The biggest mistake is an over-reliance on data. Managers will say if there are no data they can take no action. However, data only exist about the past. By the time data become conclusive, it is too late to take actions based on those conclusions.

Children build self-esteem by doing things that are hard and learning what works.

History is littered with great firms that got killed by disruption. Of course, the personal computer, a technology that first took root as a toy, got Digital Equipment Corporation. Kodak missed the boat for a long time on digital imaging. Sony was slow to get MP3 technology. Microsoft doesn't know what to do with open source software. And so on.

Ultimately, when you come up with a classification scheme that is collectively exhaustive and mutually exclusive, then the theory can become what Kuhn called a paradigm.

One reason there are so many short-lived management fads is that their prescriptions were derived and advocated in precisely this way. So managers read about a fad and try it, find that it doesn't work, abandon the effort, and move on to the next thing. In reality, it is usually the case that the faddish prescription was indeed sound advice in certain circumstances, but actually was poor advice in other circumstances.

Innovation almost always is not successful the first time out. You try something and it doesn't work and it takes confidence to say we haven't failed yet. Ultimately you become commercially successful.

In my first career I had founded my own company, with a group of MIT professors, before coming to Harvard to finish my doctorate, and so I had a deep respect for the brains, talent, and dedication of managers. That made it hard for me to believe the attributions in the business press that stupid management was to blame. So I looked elsewhere for an explanation.