For early employees you want people that have somewhat of a risk-taking attitude.

A board member of mine used to say sales fix everything in a startup, and that is really true.

If someone is difficult to talk to, if someone cannot communicate clearly, it's a real problem in terms of their likelihood to work out.

You can have a startup and one other thing, you can have a family, but you probably can't have many other things.

By the way, that's my number one piece of advice if you're going to join a startup: pick a rocket ship.

Most great companies in tech have been built by personal referrals for the first...at least 100 employees and often many more.

It's difficult to get large groups of people, to the extreme levels of focus and productivity that you need, for a startup to be successful.