Don't let people tell you your ideas won't work.
Foursquare makes maps special. We take maps that are blank and put dots on them to help you figure out what to do.
Building a product is easy. But building the company that builds the product is hard.
Don't let other people distract what you're doing. There's always haters.
Stop sketching and start building.
I learned early on not to feel badly about reaching out for help, and not to feel embarrassed about saying that you're in over your head.