A strong leader helps others grow by providing support, training, resources and guidance to help the employees. Granted you may ultimately lose the individual to another organization, but in the meantime, your business is directly benefiting from their increased skill level. Strong leaders are not afraid to delegate. Individuals develop when they are given new and additional tasks to perform. Additionally, an organization that is managed by a leader who is unwilling to give up control will never increase in size, nor will the clientele be satisfied since decisions cannot be made without the boss's approval.
Communications is a never-ending process.
Eighty percent of that time is spent listening to others. Successful leaders are able to constantly communicate the organization's vision at all levels. Additionally they are able to understand the information being presented to them from a variety of sources and then present it in a manner that everyone understands. Be available and visible. One of the most stirring moments in the movie Gettysburg was when General Robert E. Lee got on his horse and went to be with his troops.