I don't think you should ever start a business and move in a direction where you can't see it becoming a business.

Above all else, products spread when they're useful and they're usable

If you've got an idea, start today. There's no better time than now to get going.

Everyone gets lucky for some amount in their life. And the question is, are you alert enough to know you're being lucky or you're becoming lucky?

Every startup should address a real and demonstrated need in the world. If you build a solution to a problem lots of people have, it's so easy to sell your product to the world.

Instagram is a media company. I think we're about visual media. I explain ourselves as a disruptive entertainment platform that enables communication through visual media. I don't think it's just photos. There's a reason we don't allow you to upload photos on the Web as albums. It's not about taking all these photos off your DSLR putting them into an album and sharing them with your family. It's not about that. It's about what are you up to right now out in the real world, how can you share that with everyone.

In my fourth grade classroom, I even instituted a government structure, because I was really interested in people having positions and there being law.