Over 20 tools for thinking better organized into categories of systems thinking, decision making, problem solving, and communication. Some of the tools presented include the OODA loop for faster decisions, Minto Pyramid for clear communication, Ishikawa Diagram to find root causes of problems, Cynefin framework to choose appropriate responses, and Six Thinking Hats to consider decisions from different perspectives. Users can also sign up for a newsletter to learn about new thinking tools and provide feedback to the creator.