The document discusses 10 common project management mistakes in three categories - people mistakes, profit mistakes, and process mistakes. Some key people mistakes include incorrectly forecasting staff needs, hiring based on short-term skills, and hiring the wrong people. Key profit mistakes include taking on unprofitable work and lacking financial visibility and control. Key process mistakes include writing bad statements of work, bulk resource scheduling, and not tracking costs of acquiring new business. The document provides solutions for avoiding these mistakes such as managing projects and staff as distinct profit and loss statements, establishing process standards, and regularly reviewing past work.