Don't let other people distract what you're doing. There's always haters.

If there's something you want to build, but the tech isn't there yet, just find the closest possible way to make it happen.

Building a product is easy. But building the company that builds the product is hard.

Build something that fixes something people are having a problem with, and you're lined up for great things.

Stop sketching and start building.

What we're starting to see is that the best apps tend to be the simplest, the easiest to use and the fastest to use.

One of the biggest hurdles about Foursquare is you need to remember to use it.