Exactly.
I read on here in early days, "It's okay to take a peek in the rear-view mirror but don't stare. That's not the direction you're going."
There is a lot to be said for being present in this moment. It's all any of us have, anyway. Rejoicing in the moment is far more pleasant for me than bemoaning my past.
It did take some practice. I really can't afford even one negative thought.