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

There are so many startups out there raising money. I don't think this is a bad thing. It's a good thing. Entrepreneurship is in vogue. Innovators are innovating. Makers are making.

People already love to play casual games. But when you take a casual game and stick it inside a social network, it becomes way more exciting.

If you want to unleash more creativity in your company, you need to allow for a little contamination. It is the sand in the oyster that creates the pearl.

To see things differently requires you to be wired a little differently.

Startups are rapidly changing systems. If you use an annual review cycle, you aren't getting feedback at the same pace that you need to adapt and change the business.

Markets come and go. Good business don't.