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.

Embrace your constraints. They are provocative. They are challenging. They wake you up. They make you more creative. They make you better.

I think before Twitter people didn't think that way, not in any sort of meaningful or specific way, so what I'm trying to say, if we're trying a bunch of stuff, a lot of cool and great social stuff, a lot of platform stuff, then some of it will stick, and some of it will be junked over. Some of it will be just like the cell phone, you can't imagine not having it.

A personal belief is that if you're not personally invested in what you're working on, you'll fail.

I'm curious about writing in the age of online publishing. Because nobody cares about good writing online.

There's a lot of social input when you put these things out there. People's ideas cross with other people's thoughts.

Doing startups is all about making mistakes.