The personal computer was a disruptive innovation relative to the mainframe because it enabled even a poor fool like me to have a computer and use it, and it was enabled by the development of the micro processor. The micro processor made it so simple to design and build a computer that IB could throw in together in a garage. And so, you have that simplifying technology as a part of every disruptive innovation. It then becomes an innovation when the technology is embedded in a different business model that can take the simplified solution to the market in a cost-effective way.

Focus is scary—until you realize that it only means turning your back on markets you could never have anyway. Sharp focus on jobs that customers are trying to get done holds the promise of greatly improving the odds of success in new-product development.

We are all trained to be data driven people, but no hard data exist about the future. Therefore, the only way to look into the future with any degree of accuracy is to use theory, statements of what causes what and why. If executives have the right theories in their heads, they can very quickly interpret market developments. They can identify what matters and why, and act accordingly. So we suggest decision-makers should start by gaining a deep understanding of the relevant collection of theories, and then be alert for signals that indicate certain types of developments.

A lot has been written about the Internet bust. From my point of view, it's quite clear the Internet isn't a category; the Internet is a technological infrastructure that can be deployed to facilitate a disruptive business model or a sustaining business model.

Don't worry about the level of individual prominence you have achieved; worry about the individuals you have helped become better people.

If you defer investing your time and energy until you see that you need to, chances are it will already be too late.

And if your attitude is that only smarter people have something to teach you, your learning opportunities will be very limited. ... When we see people acting in an abusive, arrogant, or demeaning manner toward others, their behavior almost always is a symptom of their lack of self-esteem. They need to put someone else down to feel good about themselves.