Do not lose your temper just because someone is obnoxious. Walk away and avoid people that upset you. If you are in a self-defense situation from which you cannot easily walk away, then look the attacker confidently in the eye and exhibit no fear. Often simply showing confidence and walking away will end any abuse. You must also not court attack by your attitude or by bragging about your self-defense skills.
Bold statements encourage confrontations.
The best people in self-defense are those confident enough not to brag. When you're calm, you can think and act quickly, and speed is a key consideration in any self-defense situation. Even a relatively unskilled person in self-defense can win out over a powerful aggressor, if he or she keeps cool. If you keep your mind on your self-defense strategy, you remain calmer than if you worry about what harm may come of you. This alone may end the fight.