This guide outlines strategies for a mid-sized environmental nonprofit aiming to improve its donor retention rates (DRR). The organization, with a budget of $1M, focuses on climate change advocacy and employs a mix of online donors, event attendees, and major donors. The starting DRR is 42%, with specific goals to increase it to 46% by the end of 2025. The guide details various strategies, including enhanced onboarding for first-time donors through a five-part email campaign, personalized stewardship for major donors, and the launch of a recurring giving campaign named 'Green Sustainer'. Additionally, it discusses methods for re-engaging lapsed donors through targeted email campaigns. The document also emphasizes the importance of tracking donor retention rates and campaign performance using tools like Bloomerang and Google Data Studio. By mid-2025, the nonprofit has seen improvements in donor retention, achieving its targeted DRR by the end of the year, demonstrating that balanced strategies can lead to growth in donor engagement.