This workshop aimed to help organizations understand and use the new Effectiveness Toolkit (ETK) to document good practices, identify areas for improvement, develop action plans, and share effectiveness approaches. The ETK is based on 10 principles of good practice and operational areas and incorporates a self-assessment process through a Management Overview Tool (MOT) and Full Assessment. The workshop provided an introduction to the ETK and its online resources as well as case studies from EMMS and Jairah Funds, two organizations that have used the toolkit. NIDOS support for members includes guidance on the MOT and areas for improvement as well as mentoring and networking opportunities.