The aim of this report is to present insights from the first phase of the MitigationMomentum project that ran from February 2012 to February 2014. The project has two main goals: Firstly, and across five countries, to support governments to bring a supported mitigation action to the next stage. The second goals is to engage the community of National Appropriate Mitigation Actions (NAMAs) practitioners internationally, sharing and disseminating lessons and insights on NAMA development. The aim of this report, is to share practical insights and experiences of two years of NAMA development and discussions with stakeholders and peers. For those involved in the design and support of NAMA proposals, this report provides reflections on the evolution and role of NAMAs now and in the future, and case studies and ‘good practices’ for consideration.