Book attempts to discuss the mistakes commonly committed and what can be done to prevent them. This will help the medical students to plan and learn effectively and master the subject of clinical medicine. They can feel the presence of their teacher by their side and at the time of need they can refer to this book. It will be a useful book for all practicing doctors. PART I: Medical Education; PART II: Diagnosis; (A). General Errors; (B). Errors in Analysis of Symptoms; (C). Errors in Elicitation of Signs; PART III: Investigations; PART IV: Management; PART V: Bedside Procedures.