A good leader is always willing to do the dirty work. He'll sweep out the store if that's what's required to make a project succeed. If everyone on the team has to make a sacrifice, he'll set an example for others to follow.
Leadership is a diverse topic, and there is an enormous literature that surrounds it. Social media abounds with “insights”, to the extent that I have recently begun reflecting on what I have learnt about leading over the last 30 years in the work force. Not much seems to be new!! 
