Mine was an advice i got from an actor when doing theatre class. During a conversation i said that people used to mock me and tease me. He said i conveyed weakness with my body.
He showed me ways to show people “don’t mess with me because i won’t get no shit lightly”.
Things like, keeping posture straight, shoulders up. Strong eye contact. Say things firmly, no stutter. No hesitation. Keep your opinions, don’t change them because someone disagrees with them.
It was incredible how every interaction i had changed after that. people no longer say no shit to me