Something that would change your life by correcting a mistake you made. Even if it meant undoing the good things that came about after that mistake?
I often wondered that about myself. Had I the ability to go back and tell my younger self one thing that would make my life different. It couldn’t be something trivial like winning lottery numbers. That’s not an option. It would have to be an alternative choice to an action you had at the time. Like breaking up with someone or not. Undoing something you did. To go in one direction rather than another. You would not be allowed to give details. You would only be allowed to come back and advise about one thing. Be stern and say “When it comes time for this, go this direction and not the other.” Something like that.
I’ve thought about this more times than I can count. But in the end, I don’t think I would go back and try to influence a choice or action. Still I wonder how my life would have been different if I could.