When they concern an action that I did, I feed off of uncomfortable situations, or “mess-ups”.
Sometimes I know I could have “done something else” or “done something better”, but why bother worrying about it? What is done is done, there’s no going back.
Instead, feel good for having pushed yourself or just having lived through an uncomfortable moment, that you will hopefully learn from. It will hopefully set a higher foundation for any future action you want to execute.