This paper provides a refreshed look at our thoughts on CEO Transitions and how to achieve success rapidly during the start of a new tenure. Experience tells us that after the first 100 days the window on initiating effective change begins to close. As time passes, the entrenched status quo, the existing protocols and pecking order begin to calcify an organization’s desire for change. The window for CEO success is limited – sometimes one, perhaps two years – depending on the state of the organization when he or she “takes charge.” The idea of a honeymoon period for a new CEO is an idea largely for romantics. Time is ticking from the first day, whether you are a new CEO from the outside or promoted from within. Even a CEO who inherits a stable and financially well performing organization, has an implied obligation to articulate the organization’s next vision, priorities and future path.