This document discusses best practices for managing market development funds (MDF) programs. It begins by outlining common concerns vendors have with MDF programs, such as improving ROI, efficiency, and planning. It then presents 10 "golden rules" for effective MDF programs, including keeping programs simple, being transparent, automating processes, and measuring results. The document also provides examples of how to analyze MDF program data to understand ROI. Finally, it addresses common questions around implementing, improving, or reporting on the ROI of an MDF program.