Great leaders develop from a variety of sources including practical experience, observing others, formal training, and through trial and error. It is important for leaders to understand their own strengths and weaknesses, and to know how others perceive their image. Effective leaders draw from many different leadership styles but develop their own approach. Great leadership requires vision and inspiration to empower groups to achieve more than they believe possible. Self-reflection is crucial for leaders to learn about their understanding of leadership and identify areas for improvement.