I don't have too much interest in teaching other people how to get rich. And that isn't because I fear the competition or anything like that - Warrenhas always been very open about what he's learned, and I share that ethos. My personal behavior model is Lord Keynes: I wanted to get rich so I could be independent, and so I could do other things like give talks on the intersection of psychology and economics. I didn't want to turn it into a total obsession.

Invert, always invert.

Go to bed smarter than when you woke up.

A lot of people think if you just had more process and more compliance -- checks and doublechecks and so forth -- you could create a better result in the world. Well, Berkshire has had practically no process. We had hardly any internal auditing until they forced it on us. We just try to operate in a seamless web of deserved trust and be careful whom we trust.

This is a good life lesson: getting the right people into your system is the most important thing you can do.

Some years ago one oil company bought a fertilizer company, and every other major oil company practically ran out and bought a fertilizer company. And there was no more damned reason for all these oil companies to buy fertilizer companies, but they didn't know exactly what to do, and if Exxon was doing it, it was good enough for Mobil and vice versa.

Kellogg's and Campbell's moats have also shrunk due to the increased buying power of supermarkets and companies like Wal-Mart. The muscle power of Wal-Mart and Costco has increased dramatically.