The major reason why Instagram works is that you can follow anyone out there and start following their photos immediately.

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

The world runs on luck.

With Instagram, the focus is on the present tense.

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.

I actually think some of my best moments in life have been while I was with people from Instagram - whether it's super late nights getting a release out or being able to travel to places I'd never visited and meeting some of the most interesting people I've ever met.

I've always been into taking my photos, cropping them square, putting them through a filter in Photoshop.