Tomorrow when you come to work, if it doesn't make the customer happy, move the business forward, and save us money - don't do it.

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

Stone Age. Bronze Age. Iron Age. We define entire epics of humanity by the technology they use.

If you look at cable networks, they almost always start licensing content wherever they can, so they can build a subscriber base. But then they start doing their own content; it's a pretty well-trodden path.

About half my work in education is U.S. political reform around school districts and charter schools, and creating more room for entrepreneurial organizations to develop. And about half on technology, which I look at as a global platform.

Don't be afraid to change the model.

Companies rarely die from moving too fast, and they frequently die from moving too slowly.