In a networked world, trust is the most important currency.

People who bet against the Internet, who think that somehow this change is just a generational shift, miss that it is a fundamental reorganizing of the power of the end user. The Internet brings tremendous tools to the end user, and that end user is going to use them.

If you think about YouTube, YouTube is a 'searching the world's videos' problem, right? They all have to be there, but how do you find them? What I guess I'm trying to say is that search is still the killer app.

I've never met a person who does not want a safer world, better medical care and education for their children, and peace with their neighbours. I just don't meet those people. What I meet, over and over again, as I travel around, is that the essential human condition is optimistic - in every one of these places.

Find a way to say yes to things. Say yes to invitations to a new country, say yes to meet new friends, say yes to learning a new language, picking up a new sport. Yes is how you get your first job, and your next job, and your spouse, and even your kids. Even if it's a bit edgy, a bit out of your comfort zone, saying yes means that you will do something new, meet someone new, and make a difference in your life. Yes lets you stand out in a crowd, be the optimist, to stay positive, be the one everyone comes to. Yes is what keeps us all young.

In general in technology, if you own a platform that's valuable, you can monetize it.

I use Google+, and I find the quality of the comments are very sophisticated because there is more trust inside of Google+ than there is inside of Twitter and Facebook, for example.