From John Maxwell’s book: The 21 Irrefutable Laws of Leadership

Law 5 The Law of Addition, Leaders Add Value by Serving Others

You will not become very successful in this business until you focus on helping other people become successful. This happens when you serve others.

Law 6 The Law of Solid Ground, Trust is the foundation of Leadership

The most important thing you have is the trust of your team and even your prospects. When you say you are going to do something, do it. Your people will know when you make a mistake, it is critical that you acknowledge it before they do.