I actually once sat at the back of a payroll class in America - just me and 40 women! And I'm sitting back there, learning payroll, because I want to understand it. So that when I talk to people about payroll I know what they're talking about. And I set up and managed and ran a full payroll system myself.

The minute you hear the word 'share,' you start thinking Twitter and Facebook. These are the places that people can very quickly share something they've just discovered.

When you work for somebody who is very technical, and understands and has creative solutions to your problems, it spurs you along and stops you making excuses for things. And I found that very useful.

The power of Facebook is not only in the vast size of the connected audience, but also in the quality of the social ties and interactions that occur within the network. The Facebook social graph fuels our mantra 'Try it for free', 'Share it if you like it', 'Buy it if you love it.'

For some reason, I'm constantly attacked on social media in terms of how I dress. I've never understood that. That's been very hard.

The entire world is now a rival to Silicon Valley. No country, state, region, nor city has a lock on innovation in technology anymore.

Our attention spans have been reduced by the immediate gratification provided by smartphones and social media.

I had learnt from my years of being in the services business, like networking and closely watching the early days of the Internet, that scale leads to many possibilities.