Their business strategy was fairly simple. They were hypervigilant about controlling costs, and they believed in a decentralized corporate structure. Meaning: They didn’t think every key decision should be made by the two of them or by a small group of strategists in corporate headquarters. They hired people who were smart and decent and hardworking, they put those people in positions of big responsibility, and they gave them the support and autonomy needed to do the job. They were also tremendously generous with their time and always accessible.

