This document discusses conceptual and evidence-based guidelines for participatory approaches to improve accountability in public services. It defines key concepts like social accountability, voice, enforceability, and answerability. Effective social accountability requires these three elements to form a cycle of citizen participation, response from authorities, and enforcement. Case studies from Mexico and Tanzania show how the local context impacts initiatives. Lessons indicate participation alone is not enough and accountability outcomes require supportive public sectors and access to information. Challenges and opportunities in the MENA region relate to mobilized citizens, state-building, and ensuring sustainability through contextualization.