There is one thing though - don't start a fight if you really don't care.
Absolutely this!
A second idea is that sometimes wording makes a difference. My son hates time out and will fight it to the end, but if you tell him he is losing the privilege to do something as a result of a bad action... But can earn the ability to do something by sitting quietly in one spot without moving until the clock says XYZ, he is happy. Odd but true - phrase as punishment, unbearable, challenge with regaining something, fine.
Worth mentioning the time out cool down is needed here because the bad action is almost always a result of too hungry, tired, or sensory overload that we need him to just be calm for a moment so we can address the underlying issue.
