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.

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.

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

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.

You're going to pull out your phone and try to use whatever is the most appropriate app on your iPhone or your Android device. Yelp saw that very early on. And when we launched the mobile product, we saw immediate growth, and we were stunned.

Ignore your mistakes. The number one thing to worry about is -Am I doing what I'm good at?

We're all put on Earth for a limited amount of time. Am I using in a way that is great, or good enough, or wasteful?