I found this article in the HBR interesting and reflects the teachings of Warren Bennis and Kouzes & Posner.
To be an effective leader, find a mentor, be accountable, serve others, be globally and locally focused, and listen. To quote Stephen Covey, “Seek first to understand and then to be understood.”
Bennis, W. (2009). On Becoming a Leader- 4th ed). New York: Basic Books. http://www.amazon.com/On-Becoming-Leader-Revised-Edition/dp/0201409291
Kouzes, J. M., & Posner, B. Z. (2007). The Leadership Challenge. San Francisco: Jossey-Bass. http://www.amazon.com/The-Leadership-Challenge-4th-Edition/dp/0787984922
Steven Covey: https://www.stephencovey.com/7habits/7habits-habit5.php