Half of Google's revenue comes from selling text-based ads that are placed near search results and are related to the topic of the search. Another half of its revenues come from licensing its search technology to companies like Yahoo.

The Internet is really about highly specialized information, highly specialized targeting.

Even though Google may do very well, there will always be an alternative to what Google is doing, and people will always have the free choice... because there's no way for us to prevent them from exercising that choice. That is one of the key aspects of why the Internet has been so successful. No technologies can dominate.

Find a way to say yes to things.

I've come to a view that humans will continue to do what we do well, and that computers will continue to do what they do very well, and the two will coexist, but in different spaces.

It looks like the thing that separates out the capable students from the really successful ones is not so much their knowledge...but their persistence at something.

If you have a child, you'll notice they have two states: asleep or online.