Given New York City's cultural diversity, it has always attracted creative people.

If you have an idea that you can't get out of your head, do a startup. Otherwise join a startup.

Foursquare's adoption of a game dynamic when it launched is a particularly clever implementation of a social hook.

Building product is not about having a large team to manage. It is about having a small team with the right people on it.

Given New York City's cultural diversity, it has always attracted creative people.

Facebook is not an unstoppable juggernaut. There are a lot of other things people can do on the web.

The more entrepreneurs in the world that are getting their ideas financed, the more great companies there are going to be that we can all invest in.