You need to find people that are drawn to the idea that you build, and they end up taking it and making it even better.

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

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

I really appreciate crafts. I like cooking. I love food and drink. I love owning that through Instagram. Although that can be challenging at times because it doesn't fit people's stereotypes of a technical founder.

You can be a couple in London who happen to take pictures of their breakfasts every day - it's called @symmetrybreakfast - and you can gain hundreds of thousands of followers overnight because people are genuinely interested in your unique angle on the world.

Instagram was created because there was no single place dedicated to giving your mobile photos a place to live and to be seen.

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.