If you are like 95% of all supervisors, after your promotion, you received little to no training for your new assignment. The 5% that do get training often find it ineffectual. You are then left to learn on the job. If you survive your mistakes, it will take you an average of two to three years just to reach satisfactory performance levels. A favorite quote of iMavens is, "The years will teach you what the days, weeks and months don't know." You can ill afford to take years to become a gre...