If you know what you want, you use Google. But if you don't know what you want, and you want to be surprised and find something you didn't expect, we want you come to StumbleUpon. Really, that idea of being a discovery engine versus a search engine.

The way the Facebook network is set up, it's not as suitable for content discovery. Twitter is better, but there are too many over-sharers. Also, on Twitter and Facebook, everything comes from people you know. On StumbleUpon, it comes from people that you don't necessarily know but share your interests.

The bigger a company gets, the more people are involved in decisions, the slower decisions get made. Look, the whole theory of startups is that three motivated people can go and do something that every company can't.

A lot of productivity is capturing ideas. I use a wiki - it's more valuable than e-mail for running a company - and I have a page for every person with whom I interact frequently.