The two things I use the most are the MacBook Air and my iPhone. Those are my two most-used gadgets that are dented, scratched and smashed.

I haven't been paying attention to politics long enough to have really smart opinions.

Doing startups is all about making mistakes.

We did Twitter, and Twitter grew so fast, and in 2006 we spun it out into Twitter, Inc.

At Twitter, mobile is in our DNA ... For us, it's all about mobile, and it always has been.

We hired a CSR person at Twitter, years before we hired our first sales person, to make sure we had a culture and impact of doing good.

Embrace your constraints.