What processes would you introduce to help leaders who participate in the leadership development program to constructively develop a better self-awareness (e.g., personality, values, and personal biases)?

Self-awareness is critical to effective leadership. You are on a committee for creating a leadership development program at a large corporate organization with 12 VPs, who provide oversight to over 4,000 employees. What processes would you introduce to help leaders who participate in the leadership development program to constructively develop a better self-awareness (e.g., personality, values, and personal biases)?