The presentation discusses the most common mistakes and problems the instructor has seen on the fireground in his 29 years of experience. It explains the difference between a mistake and a problem. A mistake is a human error that is typically caused by lack of experience or training, lack of familiarity, or simply rushing in the heat of the moment. A problem is an unforeseen issue that must be overcome on the fireground. A good firefighter or fire officer will always have a Plan B. Discussed are the most common mistakes firefighters make on the fireground, the most common problems encountered, and ways to overcome them.