Ignore your mistakes. The number one thing to worry about is -Am I doing what I'm good at?

If you're building a social product, you're still living in the last century if your product doesn't work on Facebook.

Mobile is the perfect example of what is enabling economic growth in the technology sector.

You can't get married to any one particular plan. That is the biggest lesson I learned at PayPal.

The very first company I started failed with a great bang. The second one failed a little bit less, but still failed. The third one, you know, proper failed, but it was kind of okay. I recovered quickly. Number four almost didn't fail. It still didn't really feel great, but it did okay. Number five was PayPal.

If we compare the two, Facebook is currently a superior place to market a product like Slide. Twitter is more like a general distribution agent. It's like broadcast radio.

Think of Slide as a giant media network for people to transmit information. The content that's in there now has been provided by users - it's whatever they want it to be.