This document provides an overview of user experience design. It discusses that UX design focuses on designing for the user to bring about purposeful change. It emphasizes sketching, prototyping, testing and understanding user needs, goals, and aspirations rather than just past behaviors. It provides examples of improving sign-in and form experiences. It also discusses game design principles like rewards, levels and status that make experiences contagious. Ubiquitous computing is mentioned as designing for a future where all devices work seamlessly together to improve people's lives. The overall message is that UX design humanizes technology to meet user needs in an enjoyable way.