The role of a project sponsor is crucial in overseeing large projects within organizations. The sponsor acts as a bridge between the Board and the Project Manager, ensuring clear communication and decision-making. Effective sponsorship involves understanding the project's goals, resources, and constraints, while avoiding micromanagement or being too hands-off. This guide provides practical advice, exercises, and real-world examples to help sponsors manage the business case of the project successfully. It emphasizes the importance of making sure the organization is both 'doing the right things' and 'doing things right'.