Biz Stone

I'm still kinda old-school. We're twittering, and we're all twitterers. And we write tweets. The only thing I don't love is twits.

I thought about tennis. But the more I thought about the whole thing - lessons, equipment, going to the courts - I said screw it, I'm just going to go buy a pair of sneakers and go running.

The reason I really started running was for meditative purposes. I would pick some problem to have in my head while running.

For me, I've learned about what it means to focus on a culture, to build social responsibility, and the idea of a company as a super-organism.

We focus a lot on culture specifically at Twitter because of this spotlight, and of the fact that we don't want to end up like the child actor who found success early and grew up all weird and freaky.

If you're thinking of acquiring a company and want to keep it a secret, tell everyone in the company; let them all in on the truth. Say, 'Listen, if this gets out, we'll probably lose the deal, so we're all in this together.'

Doing startups is all about making mistakes.

In a job where you're on a computer all day, and we cater lunch and we put snacks in the kitchen, well, we all started gaining weight, even though we try to pick healthy stuff, but inevitably you find the cashews.

I'm convinced that there's a new way to define capitalism, and that the definition should include three ingredients - that we love our work, that we are building a traditionally successful business, and that we are having some positive impact in the world, whether it's local or global.

I believe that the open exchange of information can have a positive global impact.

This idea that the open exchange of information can have a positive global impact is being proven over and over again around the world nearly on a daily basis - and for Secretary Clinton to recognize that, I think, is a huge step.

I think when people twitter 20 or 30 times per day, that's too much. They are boxing everyone else out, and people stop following them because they need a break.