Mobile is the perfect example of what is enabling economic growth in the technology sector.

If you're building a social product, you're still living in the last century if your product doesn't work on Facebook.

The single most important top-level trend is the shift to mobile.

Being an entrepreneur is not about being in love with an idea, it's about being in love with running a company.

If we compare the two, Facebook is currently a superior place to market a product like Slide. Twitter is more like a general distribution agent. It's like broadcast radio.

If I see what you're up to on Facebook but I don't see your updates on Flickr, I'll still care about Facebook.

You can have successful teams where people hate but deeply respect each other; the opposite (love but not respect among team members) is a recipe for disaster.