I heavily overinvest in recruiting. I have an understanding with certain search firms that if you find someone great, don't wait until there's a job opening - send him to me.

I don't have an office. I sit in a cubicle with everybody else. That's partly so no one can ask for an office, which in a fast-growing company isn't practical. But it's also so I can keep my finger on the pulse of how people are feeling.

The best way to be productive is to have a great team. So I spend more time than most CEOs on human resources. That's 20 percent of my week.