This document discusses the importance of data management and sharing plans for research projects. It recommends developing three types of plans at different stages: a minimal plan for grant applications, a core plan once funding is received, and a full plan addressing long-term data management. The Digital Curation Centre provides guidance on what to include in plans, such as administrative data, data collection, documentation, storage, and sharing. It also offers an online tool and examples to help researchers create effective data management and sharing plans.