This document discusses lean thinking and e-commerce. It provides advice on creating products that make sense for customers and exploring what is still unknown. It emphasizes that business plans often fail when confronted with real customers, but having one is still important. The key is to work on understanding customers instead of just the product. Customer development, pivoting when needed, and identifying the minimum viable product are important concepts. Most companies get the strategy right but fail at implementation, so measurement and adapting based on learning are also discussed.