This document discusses thinking tools that can help people think more systematically and effectively. It covers four main thinking tools: questioning, concepts, mind maps, and Cognitive Research Trust (CoRT). Questioning involves constructing questions to motivate thinking, using techniques like the Five Ws and Hs and Bloom's Taxonomy. Concepts refers to organizing ideas into categories defined by their properties and examples. Mind maps are visual representations of how concepts relate to each other. Cognitive Research Trust provides structured techniques for problem-solving. The document provides examples and explanations of how to apply each thinking tool.