I'm letting people who hurt me in the past live rent free in my mind.
One episode involves a former landlord that tried to run me over in an intersection with no traffic cameras.
Another one involves a manager that fired me for informing that one of his favorites yelled during night shift and ignored alarms to talk. He fired me the next day, used the exit interview to tell me everything I didn't do right (but kept quiet about his favorites, even though I did the job like them), still had the utmost confidence on his favorites, accused me of being lazy and instead of simply firing me and keeping neutral he chose to take it personal, proceeded to try to scare me insinuating I wouldn't work for his system again, when that failed, tried to humiliate me and then fired me. This was in an non union hospital.
When I think about it I get angry. Id like not to be so thin skinned, but here I am.
I'm still learning how myself, but something that's helped so far is repeatedly telling myself that the only way they can hurt me now is if I'm thinking about them.
It's the only weapon people have left once they're out of your life. If you keep being angry about something that's long over, you're giving them the power to keep hurting you, free of any effort on their part, and they don't deserve that luxury.