Supervisory training teaches you about a lot of things you should do, such as how to prepare a performance appraisal, conduct a meeting, divide up work, or manage your time. What it usually leaves out are all the things you shouldn't do--the subtle and not-so-subtle mistakes in managing people that could haunt you the rest of your career. Now there's a comprehensive, instant-answer guide to avoiding over 100 of the most common mistakes made by managers...