I learned much at hundreds of lectures at MIT and Wharton. But one of my most vivid memories was a luncheon speech by the venerable Mr. Murphy. He said that once he had been asked to give a lecture to a group of teenagers about life in all its aspects. So he thought this was a pretty tough task, after lunch and for only 10 minutes. This is what he said and I admit I have used this advice with my four children.
He got up and said to the kids:
CIRCULATE – EVALUATE – ELIMINATE – CONCENTRATE and then he sat down.