If you manage a team of 10 people, its quite possible to do so with very few mistakes or bad behaviors. If you manage an organization of 1,000 people it is quite impossible. At a certain size, your company will do things that are so bad that you never imagined that youd be associated with that kind of incompetence.

Business ends up being very dynamic and situational.

Groupon looked like a very high valuation, but any investment in a great company at any stage is almost always a good investment.

Leadership is hard to train on.

Most large mistakes in organizational design come from putting the individual ambitions of the people at the top of the organization ahead of the communication paths for the people at the bottom of the organization.

You know what the difference between a vision and a hallucination is? They call it a vision when other people can see it.

The most important thing you can learn as CEO- one of the hardest things to do is, you have to discipline yourself to see your company... through the eyes of the people that you're working through. Through the eyes of the employees, through the eyes of your partners... through the eyes of the people who you're not talking to and who are not in the room.