A good resource for the creation of an entry plan for a head new to a school. I have used this myself and have coached several principals on adapting this to a school setting.
From the website: "Transitions are a critical time for leaders. In fact, most agree that moving into a new role is the biggest challenge a manager will face. While transitions offer a chance to start fresh and make needed changes in an organization, they also place leaders in a position of acute vulnerability. Missteps made during the crucial first three months in a new role can jeopardize or even derail your success."