Yes, you are aware of all stereotypical methods to get peaceful mind, but here is available some non-conventional methods. That is "Ignore", if you simply ignore what other people think about you, you can have 99℅ chances to achieve peace.
Also do not try to impress everybody since it's very tough job to satisfy and win everyone, for that you need to waste time,money or both in some cases. If you no more required to impress others you are saving that time. Do some useful work with that time.
Make yourself busy with something to avoid some talkative people and non sense debates on politics and movies and especially on third person.
