This toolkit is an operational guide for mental health organizations engaging people with lived experience when implementing mental health programs and initiatives. It offers guidelines and practical strategies for moving toward authentic engagement that gathers meaningful input, improves outcomes, and aligns services with real-world needs. Readers will be guided through a foundational understanding of engagement in the context of implementation science, followed by an actionable framework for self-assessment and goal setting to track organizational benchmarks. Finally, the toolkit offers strategies for building community trust, navigating power imbalances, allocating resources, connecting with communities, establishing fair financial compensation, and creating accessible meeting environments.