Many concerns now make part or the whole of their dividends from by-products that formerly went to waste. How do we, as individuals, utilize our principal by-product? Our principal by-product is, of course, our leisure time. Many years of observation forces the conclusion that a man's success or failure in life is determined as much by how he acts during his leisure as by how he acts during his work hours. Tell me how a young man spends his evenings and I will tell you how he is likely to spend the latter part of his life.