You're the manager. Now it's your job not only to do your own work but to make sure others do theirs. You must integrate the functions of your department with the needs and goals of your company. You must be both motivator and taskmaster. When things go wrong, all eyes turn to you. You may need to identify and resolve performance issues and problems. Remember the exhilaration you felt when you first got your job? Good! It will cushion the bumps of the road.