This document discusses effective leadership behavior based on a study of over 189,000 people in 81 organizations. It finds that the most effective leaders display four key behaviors: effective problem solving, results-oriented focus, support of others, and pursuit of different perspectives. These four behaviors explain 89% of the difference between strong and weak organizations. The document also presents a situational leadership staircase model for improving leadership behavior based on an organization's current state of health. It identifies baseline behaviors required at all levels and additional behaviors needed to transition to higher levels of effectiveness. Templates are included for presenting information on leadership behaviors.