Every organization has written and unwritten rules. Written rules and policies require written changes, which are generally shared and acknowledged. What trips many people up about new bosses are unanticipated, unrealized changes to the unwritten rules. When you get a new boss, do everything you can to read the unwritten rule changes and adapt to your new boss’s rules immediately. When you are the new boss, help others understand your unwritten rules as part of your onboarding.