Skype has a great engineering team, which I like to describe as 'all of Estonia.'

One of the advantages of moving quickly is if you do something wrong you can change it. What technologies tend to do is they tend to make a lot of mistakes... but then we go back and aggressively attack those mistakes - and fix them. And you usually recover pretty quickly.

My goal is not to fail fast. My goal is to succeed over the long run. They are not the same thing.

We call it the 'Rule of Crappy People'. Bad managers hire very, very bad employees, because they're threatened by anybody who is anywhere near as good as they are.

There's a new generation of entrepreneurs in the Valley who have arrived since 2000, after the dotcom bust. They're completely fearless.

The smartphone revolution is under-hyped, more people have access to phones than access to running water. We've never had anything like this before since the beginning of the planet.

Out of ten swings at the bat, you get maybe seven strikeouts, two base hits, and if you are lucky, one home run. The base hits and the home runs pay for all the strikeouts