Book excerpt: Books about the Internal Medicine clerkship have generally focused on educating medical students on what they should do. What is often left out is any discussion about the things that students should not do. With that being said, it should come as no surprise to anyone that students make the same mistakes year after year. Since students can gain valuable insight by learning about their predecessors' mistakes, we offer you this new book titled the Internal Medicine Clerkship: 150 Biggest Mistakes and How To Avoid Them.This book not only introduces you to these mistakes but also shows you how to avoid them. Avoiding these pitfalls is crucial for rotation success. Once you are familiar with these errors, you can do everything in your power to avoid them, thereby placing yourself in a position to excel during the clerkship.