I asked successful people what the secret of their success was. I (36) an early discussion with a vice president of a large oil company. "Oh, ! just keep a To Do List," he said. I passed over that quickly, little (37) the importance of what he said. I was in another city the next day and I had lunch with a businessman who (38) owned the town. He was chairman of the gas and light company, president of five (39) companies, and had his hand in a dozen other (40) . I asked him how he (41) to get everything done. "Oh, that’s easy," he said. "I keep a To Do List." The first thing in the morning, he told me, he would come in and list what he wanted to (42) that day. He would arrange the items in (43) . During the day (44) . In the evening he would check to see how many of the items he had written down still remained undone and then give himself a score. (45) Again and again in the years since, when I have talked to successful people, the To Do List has come up. I have found that one difference between people at the top of the ladder and people at the bottom is that (46) .