Understand that people will have bad days and make stupid decisions sometimes. Be tolerant of this. We all make mistakes. Just because something has been done one way for the longest time, doesn't mean it is the best way. Change for the sake of change leads to disaster.
Big wheels turn slowly.
This does not mean that you can't grease them. Don't blindly follow rules because they are rules. Seek to understand why the rules were put in place and follow them for that reason. If a rule does not make sense or has no logical base, work towards getting it changed. Sometimes it is best to let sleeping dogs lie.