Many people go through their days following overloaded schedules. If you want to meet them, you can do so in two weeks… Some people even take pride in these heavy schedules of meetings as a reflection of their productivity. Alas, it doesn’t work. There’s one thing that the truly successful people in the world share: They have time. By his own estimate, Warren Buffett has spent 80 percent of his career reading and thinking. One week he had only one appointment scheduled: for his haircut. Ben Franklin once wisely said: “An investment in knowledge pays the best interest.”