The document discusses using nudges to close the gap between people's intentions and actions. It notes that people often think reflectively about behaviors but don't sustain those reflections in their actual behaviors. The nudge approach to design aims to influence behaviors by understanding things like default options, incentives, and feedback. The document provides examples of nudges around food choices and fueling up. It promotes designing with an understanding of things like automatic thinking and how to guide people toward healthier choices through subtle influences on their environment and options.