wish I were a warrior (not worrier)

I made some mistakes at work this past week, and it stinks.  Cuz now my boss is mad at me, and he’s taking away some of my privelages.  The problem is I can’t get it off my mind.  When I drove home from work this morning, I was thinking that I’m not good at not bringing work “home with me.”  This should be like the easiest job to not bring home with me too.  I just paint.  Other than the fact that I have paint spackled on my arm when I go home, I shouldn’t have much to worry about when I’m not working.  But I do.  I’m a worrier.  Wish I were more of a warrior.  Any solutions?