We try to exert a Ted Williams kind of discipline. In his book The Science of Hitting, Ted explains that he carved the strike zone into 77 cells, each the size of a baseball. Swinging only at balls in his "best" cell, he knew, would allow him to bat .400; reaching for balls in his "worst" spot, the low outside corner of the strike zone, would reduce him to .230. In other words, waiting for the fat pitch would mean a trip to the Hall of Fame; swinging indiscriminately would mean a ticket to the minors.
Warren BuffettMy rather puritanical view is that any investment manager, whether operating as broker, investment counselor of a trust department, investment company, etc., should be willing to state unequivocally what he is going to attempt to accomplish and how he proposes to measure the extent to which he gets the job done.
Warren BuffettIf past history was all there was to the game, the richest people would be librarians.
Warren BuffettIt's got to be the best intellectual exercise out there. You're seeing through new situations every ten minutes. In the stock market you don't base your decisions on what the market is doing, but on what you think is rational. Bridge is about weighing gain/loss ratios. You're doing calculations all the time.
Warren Buffett