What are the common mistakes of new managers? Good management has been thoroughly studied, and is widely understood, but it is still more honored in its breach than in its practice. Most new managers, in particular, get it wrong. Name five mistakes that a new general manager can make when running a business for the firs time? as part of this assignment, you must propose a way to fix the mistake. For example if you listed Micromanagement is a common mistake made by inexperienced managers, you should propose a way a manager can use to avoid that.