The most powerful sign is that your work no longer enchants you - it's not deep, delightful, and mutually satisfying. When this happens, it may be time to look for new challenges.

At the end of my life, is it better to say that I empowered people to make great stuff, or that I died with a net worth of $10 billion? Obviously I'm picking the former, although I would not mind both.

If you make meaning, you'll make money.

It doesn't matter whether the Dow is 5000 or 50,000. If you're an entrepreneur, there is no bad time to start a company.

Good people hire people better than themselves. So A players hire A+ players. But others hire below their skills to make themselves look good. So B players hire C players. C players hire D players, etc.

Smart, well-meaning people get it wrong when they start believing that the world owes them something and that the rules are different for them.

You need to earn the right to promote.