This document discusses strategies for establishing and maintaining a sustaining donor program. Some key benefits of sustaining donors include more reliable cash flow throughout the year, high renewal rates, and larger total gifts compared to single donations. Challenges include initial disruption of cash flow and accounting issues. Sample programs from nonprofits are provided that focus on recruitment, stewardship such as thank you gifts, and asking existing donors to upgrade contributions. The document concludes with tips on managing sustaining donors within a donor database.