A few days ago there was a link here on HN about marginal advantages in game design, how the best Starcraft players thrive in environments where they are just a smidgen ahead of their opponent, and maneuver themselves in such a position, in contrast with the amateurs who want to 'win big' - have a big lead and crush their opponent in an overwhelming fashion. It's an eye-opening read, putting in words a property of winners that I never quite managed to capture myself. The theory applies to businesses equally - in a mature market, you can never be hunkered down, playing an all-defense game while you build up resources and then crush the opposition. By that time, that competition will have eaten your lunch and driven you out of business.