Living abroad I have learned the following office etiquettes that may apply to outside office as well:
1. Never boast about your experience or expertise, I have witnessed someone doing that who was highly disregarded for this action.
2. Always respect your co-workers and treat them equally: you can’t be great by degrading others.
3. Never defend your mistakes, if you have done a mistake admit it to the concerned people and correct your mistake. People notice what you do, a lot of times in a professional environment they don’t say anything but they do keep in their head which eventually goes against you.
4. Never work after office hours, if something is unfinished, come back next day and finish it.
5. Never ask someone’s salary, NEVER
6. Never ask someone where they worked and how many years of experience they have, that’s highly unprofessional. They can tell you if they want to you should never ask.
7. Never tell people what to do, they have lived their life upto this point so they are okay you don’t need to worry about them.