This document introduces life extension and design thinking as approaches to redesign one's life for optimal health, longevity, and performance. Life extension involves using therapies and lifestyle optimization to extend the healthy human lifespan and potentially end aging. Design thinking is a human-centered process that can be applied to redesign any experience, including one's own life and approach to health. The document advocates using design thinking tools and frameworks to practice life extension by constantly redesigning one's life and habits towards better health and a longer lifespan.