People can copy what you've done, but they can't copy what you still want to do.

Foursquare makes maps special. We take maps that are blank and put dots on them to help you figure out what to do.

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.

Don't let people tell you your ideas won't work.

Stop sketching and start building.

Don't let people tell you your ideas won't work. If you're passionate about an idea that's stuck in your head, find a way to build it so you can prove to yourself that it doesn't work.

Forget about where you want to be and go out and build stuff. Dodgeball came from being bored at work... things happen because you make them happen. Stop sketching, and start building.

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

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.

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

Stop sketching. Start building.

Just so everyone knows, we're not a photo-sharing company. I don't see photos on 'Instagram' as art. They're much more about communication.

I'm just very thankful. And I say that a lot because that's the most important message.

People think of poetry as a school subject... Poetry is very frustrating to students because they don't have a taste for ambiguity, for one thing. That gives them a poetry hangover.

Many environmental advocates argue that agricultural pollution will be reduced only through stronger federal laws.

Music has as many roles as people make it.

Even married people have differences of opinion, I'm told.

Accept change as a friend. And don't take yourself too seriously.

Sometimes, not getting what you want can be the most valuable experience of your entire life.

While the other guy's sleeping? I'm working. While the other guy's eatin'? I'm working.

When someone is denying what they are, then that's when things start to spiral down.