Technological revolutions are very hard to predict. My favourite example is someone in 1850 taking care of horses as a farrier. They would have said, "Look, horses have been part of human existence for 5,000 years. We are horse people. It's permanent." But all of a sudden, the internal combustion engine comes along and, with it, oil fields and automobiles, which basically replace the horse completely. So we often have these long periods of stability and then a sudden inflection point.

I'm an HBO subscriber, and I watch a bunch of great shows on HBO.

Do not tolerate brilliant jerks. The cost to teamwork is too high.

On the Internet you get continuous innovation, so every year the streams are a little better.

What's got me excited about the education space is the growth of the Internet over the next 10, 20, 30 years.

The best managers figure out how to get great outcomes by setting the appropriate context, rather than by trying to control their people.

I don't know of any Internet service that opens on a regional basis.