One of the torturous things about my job is that, as time goes on, you get more and more clarity on all the things you've screwed up and all the mistakes you've made.

The same regions of the brain light up when someone touches their smartphone as when they touch a family member or a pet.

I'm easy to find on the Internet.

Mobile is something I think about all the time now.

I am very aware that I'm one of the luckiest people who ever lived.

Groupon has some interesting assets.

I think mobile advertising is going to be huge.