I used to be paranoid as a motherfukker. Not just of police, but everybody. Family, friends, neighbors, coworkers, girlfriends. There was a point where I just said fukk it. I'm not paranoid anymore but I don't sit around and stew about anything until it begins to happen. In other words i don't cross bridges until I come to them.
I can't say the overall quality of my life has improved but I'm a lot less stressed and I don't waste mental energy worrying about "what are they thinking?" "what are they going to do?" "What if this happens" etc.