Every time when we think,  “I wish I would have done that differently”, we are thinking about something we can’t change.

What’s done has been done.
No amount of thinking will change that.
No amount of regret will change that.

What we can change is what we do next.
So, here are better questions to ask.

“What stopped me from doing whatever it is that I should have done?”
“Do those things still exist in my life?”

“What was it that I did not know back then?”
“Do I know it now?”

Everyone makes mistakes. But not everyone learns from those mistakes.
Something exists between all the rights and wrongs. And that something is called reflection!