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.

If people are passionate about your product, whether it's because they're hating or loving it, those are both good scenarios.

The most rewarding thing for me has been this affirmation for me that people are basically good and smart, and if you give them a simple tool that allows them to exhibit that behavior, they'll prove it to you every single day.

Once true passion hits you, you can recognize all the times in your life you were chasing the wrong dream. And after you've experienced that sustained fulfillment, you'll never want to settle for anything less.

Obviously, working at Google wasn't a mistake. I used to just walk around. I don't know if I was supposed to, but I'd just open doors and see what people were doing.

If you make the opportunity. you'll be the first in the position to take advantage of it.