Learn how to ignore the examples from others when they are wrong, because few skills are more worth having.

Obviously, consideration of costs is key, including opportunity costs. Of course capital isn't free. It's easy to figure out your cost of borrowing, but theorists went bonkers on the cost of equity capital. They say that if you're generating a 100% return on capital, then you shouldn't invest in something that generates an 80% return on capital. It's crazy.

The ethos of not fooling yourself is one of the best you could possibly have. It's powerful because it's so rare.

Assume life will be really tough, and then ask if you can handle it. If the answer is yes, you've won.

The name of the game is continuing to learn. Even if you're very well trained and have some natural aptitude, you still need to keep learning.

The model I like to sort of simplify the notion of what goes on in a market for common stocks is the pari-mutuel system at the racetrack. If you stop to think about it, a pari-mutuel system is a market. Everybody goes there and bets and the odds change based on what's bet. That's what happens in the stock market.

With Congress and the S.E.C. so heavily peopled by lawyers, and with lawyers having been so heavily involved in drafting financial disclosure documents now seen as bogus, there was a new "lawyer" joke every week. One such was: "The butcher says 'the reputation of lawyers has fallen dramatically', and the check-out clerk replies: "How do you fall dramatically off a pancake?