Four things a manager must do to help their team reach its full potential

The main task of a manager is to support the strengths of subordinates and achieve maximum, yet sustainable productivity of the team. A good leader employees like working for and are willing to go the extra mile to reach the common goals is someone with excellent communication and management skills, someone capable of enthusing their employees for a common vision. What four things must a manager do to be a truly effective leader who helps their team reach its maximum potential?