How do I keep sponsors long-term instead of just getting a one-year deal?

Long-term sponsorship retention comes from: building trust through consistent performance and reliability, making the sponsor's life easy rather than creating problems, having a solid team and program that doesn't require constant handholding, being relationship-oriented rather than transaction-oriented, and never pulling out the contract after it's signed (which signals no real relationship exists). Invest your own resources to ensure your program runs at a high level - sponsors want to back programs that would succeed anyway, not build race teams from scratch. Maintain the same key personnel so sponsors develop relationships with your whole team, not just you.