Leadership is the key to excellence. And leadership can be learned. Thank goodness, because many people who fall into managerial positions haven't the foggiest notion how to lead. They don't feel driven to attain the competencies of a boss -- much less a great boss. Lorraine Monroe is a born leader. She caught the bug early, as secretary of the student council in the fourth grade at P.S. 157 in Central Harlem. She went on to found the Frederick Douglass...