Jim Trinka’s study of manager-employee surveys in government and industry reveals what surely must be best-kept secrets. For example, by focusing on “developing others,” and “communication” competencies, managers can increase their overall leadership effectiveness by 50-60 percent. To drive his points home, he shows that 10 managerial activities—out of a possible 250—have the most potential for delivering high employee performance. Do yourself and other managers a favor: Read this paper and pass it on.