In the same way that you're driven in your business to keep innovating - Facebook is a wonderful example of constant innovation - think about doing that in philanthropy.

I was raised with the notion that you can do pretty much do anything you want. I always kind of just went ahead and tried things.

You should pursue your passion. If you're passionate about something and you work hard, then I think you will be successful.

I always kind of just went ahead and tried things.

An honest, open environment can bring out the best in people.

What we say here every day is that our success is really based on our members' success, our community's success. We've created an infrastructure and laid some basic ground rules to create this marketplace.

In 1991, I co-founded my first start-up, Ink Development, which made software for an early tablet computer.