In the face of increasing pressures on forests, many countries have begun to explore REDD+ as a mechanism to provide finance for maintaining forest cover and reducing emissions from the forestry sector. With imminent establishment of the ASEAN Economic Community in 2015, the importance of mitigating greenhouse gas emissions by means of effective policies and measures has been highlighted in Article 55 of the ASEAN Economic Community Blueprint (ASEAN, 2008). This decision support tool attempts to fill this gap by describing a process to assess and address drivers in REDD+ countries. This tool is the result of a collaborative process between the ASEAN Regional Knowledge Network on Forests and Climate Change (ARKN-FCC) and the USAID-funded Lowering Emissions in Asia’s Forests (LEAF) project to develop guidance on how to implement a process that changes the trend and direction of the factors responsible for driving deforestation and forest degradation.