Presentation given at Interaction'12, February 3, 2012, Dublin, Ireland. Interest in persuasive design for behavior change has been growing rapidly in interaction design in the past years. In part thanks to that, we as designers now have ample tools and pattern libraries to inspire us. What we are lacking, however, are focus and guidance in applying them. Usually, we get those from user research. But current research methods and deliverables arguably do not provide ready springboards. This presentation demonstrates how to use the Motivation Ability Opportunity (MAO) model as a tool to structure user research around a single behavior to be changed, and to guide subsequent design in prioritizing issues to tackle and ideating ways to tackle them.