The Leadership Skills Inventory–Others (LSI –O) allows leaders to measure how their skills are perceived by their team and colleagues. Coaches use this assessment with their clients to excel at leading their clients. HR professionals use it to determine what training would benefit middle managers and supervisors. Use the Self and Others versions of the Leadership Skills Inventory together for a 360º view of a leader’s skills. The information these tools provide will enhance the development of truly effective, motivating leaders.