When building a data management plan, some things to consider are:
Data management planning can be complicated and overwhelming. DMP Tool is a great resource for finding some guidance on how to store, preserve, and organize your data. You can link the tool up with the guidelines for your institution/granting agency to make sure you are meeting all requirements necessary for your project.
You can find examples of Data Management Plans through the University of Michigans Research Guide or through the Digital Curation Centre.