Millennials are redefining what it means to develop future leaders. In business organizations, leadership development-defined as "the expansion of a person's capacity to be effective in leadership roles and processes"-has traditionally been the work of corporate development programs for select employees handpicked and cultivated by senior management. With the millennial generation of leaders, however, leadership self-development is becoming far more common. This note embraces the movement towards leader self-development. It also recognizes that, for it to be successful, those who are now in the driver's seat-the high-potential and emerging leaders themselves-must be equipped to succeed. The note lays out the PACE Model for leadership self-development, grounded in research, to help developing leaders forge systematic habits to accelerate self-development and success.