Be Peaceful but don't be a pushover, just know when to switch from passive to active. That is to show that you cannot be dealt with as someone who is considered a nobody.
It is not nice to always be the one to tell people to calm down. Sometimes if they do not behave accordingly you pull the strong arm card and play it very well.
They will be like - he is gentle but do not tempt or wake the sleeping tiger. A kung-fu master is always meditating and seeking inner peace but when necessary, he uses drunken master kung-fu style to finish his enemies.
Learn to mind your business, it will save you a whole lot of headaches and unnecessary waste of effort. It will definitely stop you from wasting money and time on things that have no bearing to your progress.
If you aren't invited, don't attend.
If your opinion isn't requested for, don't talk.
If it doesn't concern you, don't intrude.
If it is not an emergency, do not intercede. Allow the appropriate authorities take charge of that situation.
Behave like you didn't see it even if it's right in front of you. Your ability to be peaceful will make you feel like you have got superpowers.