Regrets

[Sarah]

The things you have done in the past that you [wish] you had done differently.
The [chances] you wish you had taken.
The things you have done in the past that you wish you hadn't done.

Something to consider when in a situation you think you might regret in the future:
If you do it you’ll regret it,
If you don’t do it you’ll regret it, Either way your going to regret it,
So you might as well just do it

[Monty]

a feeling of sadness about something sad or wrong or about a mistake that you have made, and a wish that it could have been different and better: