You cannot become a great leader without self-awareness.
Self-awareness is the ability to accept and proactively use feedback about oneself to improve your leadership skills.
Self-aware leaders are able to respond appropriately to people and situations. Successful leadership involves taking people on a journey into an uncertain future. As such, leadership is not something that can be executed by following a step-by-step recipe. Instead leadership demands you experiment, reflect, learn and adapt to a constantly changing environment.