Attention is the fundamental instrument we use for learning, thinking, communicating, deciding, yet neither parents nor schools spend any time helping young people learn how to manage information streams and control the ways they deploy their attention.

The idea that your spouse or your parents don't know where you are at all times may be part of the past. Is that good or bad? Will that make for better marriages or worse marriages? I don't know.

Advertising in the past has been predicated on a mass market and a captive audience.

People's social networks do not consist only of people they see face to face. In fact, social networks have been extending because of artificial media since the printing press and the telephone.

For the first two years of Eventbrite, all the work was done by just the three founders: me, my husband, Kevin, and our chief technology officer, Renaud Visage.

Digital books are still painfully ugly and weirdly irritating to interact with. They look like copies of paper, but they can't be designed or typeset in the same way as paper, and however splendid the cover images may look on a hi-res screen, they're still images rather than physical things.

Our technology, our machines, is part of our humanity. We created them to extend ourselves, and that is what is unique about human beings.

I don't know if the art of stand-up will survive. Stand-up seems dated. Now you can do a mini-movie or a short with a beginning, middle, and end. A guy standing there seems a little old - especially when you can go on the Internet and see 'Funny or Die.'