This document provides an overview of business model design. It discusses three key steps in business model design: visualizing the business model canvas, assessing strengths and weaknesses, and improving opportunities. The business model canvas is used to map out the key partners, activities, offers, customer relationships, customer segments, resources, channels, cost structure, and revenue streams. Business model patterns and examples like the long tail and two-sided markets are also examined. The document emphasizes adopting a design mindset to iteratively improve business models.