Technology has allowed services to have a more pervasive role in people's lives, influencing their everyday behaviors. And we are swimming in a sea of academic insights on how people make decisions and what levers influence their behavior. But what does it mean to apply these insights practically in the design of our products and services? How do we leverage new behavior change methods into our existing design workflow? How can we understand and harness machine learning and agentive technology for positive behavior change? Whether prompting a single action, or designing a whole behavior change system, what are the methods and techniques that help us design for behavior change?