Clear Thinking by Shane Parrish is a practical guide that teaches readers how to improve their decision-making skills by becoming more aware of critical moments that require clear thought. The book highlights how, under stress, individuals often fall back on automatic thinking patterns driven by biases and unexamined assumptions. Through a combination of stories, mental models, and frameworks, Parrish provides tools to help recognize these moments and engage in better, more intentional thinking. This approach can lead to improved outcomes in personal and professional life, ultimately helping readers achieve greater success, wealth, and fulfillment.