1. Effective leadership can have a significant impact on key organizational outcomes such as turnover, customer satisfaction, and financial performance. Great leaders, in particular, can produce twice the impact of good leaders. 2. Traditional leadership development focuses on fixing weaknesses, but research shows building strengths is more impactful. Having multiple strengths can raise a leader's effectiveness to the 81st percentile. 3. Certain combinations of strengths, like driving results and strong interpersonal skills, are especially powerful. Non-linear development approaches that leverage strengths may provide a new path to leadership growth.