For me I battle with regrets about all the time I wasted..all the time I spun my wheels and never learned how to grow up and deal with my emotions or how to handle conflict. All the money I wasted and the opportunities I never explored. But there is nothing I can do about..the thoughts come..and they go, cuz that's what thoughts do. The trick is ..don't judge the thoughts.they are what they are. What you resist, persists. They are just feelings and thoughts, they won't kill (booze will though). You are processing rather than denying and smothering your mind with a booze cloud. This too shall pass. It gets better all the time....