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

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

We're becoming slaves to our social networks - and that's not a bad thing. You like your favorite networks, so do you friends, and pretty soon you have market winners.

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

Facebook is so ubiquitous now that it's like another manifestation of the web itself.

If you can work a brand successfully into the narrative of your product, then it's really cool. Then people actually take the brand up and say, 'My positive experience in your product is directly connected and influenced by this brand and that worked great.

Right now, nearly all the apps on Facebook take a week to build. No more.