This document provides guidance on developing and implementing Monitoring, Evaluation and Learning (MEL) systems to strengthen organizational effectiveness. It discusses key MEL concepts including the differences between organizational and project MEL, the MEL cycle, planning MEL, collecting and analyzing data, and learning from MEL processes. Tools like the Weaver's Triangle and logical framework are presented to help visualize goals, outcomes, outputs, activities and indicators for MEL planning. The document aims to increase knowledge and skills around MEL to enhance impact and meet funder requirements.