Mark McCormack, in his book What They Don’t Teach You at Harvard Business School, tells of a Harvard study conducted between 1979 and 1989.
It turned out that only 3 percent of the graduates had written goals and plans. Thirteen percent had goals, but they were not in writing. Fully 84 percent had no specific goals at all.
Ten years later, in 1989, the researchers interviewed the members of the class again. They found that the 13 percent who had goals that were not in written were earning, on average, twice as much as the 84 percent of students who had no goal at all. But most surprisingly, they found that the 3 percent of graduates who had clear, written goals when they left Harvard were earning, on average, ten times as much as the other 97 percent of graduates all together. The only difference between the two groups was the clarity of the goals they had for themselves when they graduated.