Habit of thinking should’ve, could’ve, would’ve

I have a habit of always thinking about what could have been or what I should have done differently to have created a better outcome. I understand that hindsight is 20/20 and that it doesn’t serve my interest to think this way. It is an ingrained habit of thinking. I am wondering if there are any suggestions to try to change this way of thinking so I am not so past focused? I know Brooke teaches there is no right decision but I am having a hard time believing that.