How do you stop thinking about work after work?

I'm a new-ish (couple of months) sub teacher and I find myself thinking about work constantly. It stresses me out but I can't seem to stop doing it. I meditate and that helps a bit but its still very difficult to stop thinking about all the interactions I've had throughout the day and ways I could have done things better. What are your favorite strategies that help you move on from work when you clock out?