How to Avoid Five Common People Management Mistakes People who work at jobs usually have a boss or manager who helps them do their job well. However, sometimes these bosses or managers make mistakes that make people feel unhappy or stressed at work. Effective people management is essential for the success of any organization. However, there are common mistakes that managers often make that can have a negative impact on employee morale, productivity, and the overall success of the business. Here are five common people management mistakes and how to avoid them.