Effective monitoring and evaluation of labour migration and anti-trafficking projects remains a key challenge for many international and non-governmental organizations, particularly in terms of obtaining evidence of the impact of interventions in protecting migrant workers from exploitation and abuse. The tools and guidelines provided within this publication are a synthesis of lessons learned during four years of dynamic collaboration between the ILO and government, trade union and civil society partners in providing support services to migrant workers under the GMS TRIANGLE project. It offers practical strategies, as well as an adaptable training resource, for rights-based projects to measure results.