I am (now) trying not to have regrets.....BUT someone said to me a few years ago, If you are going to have regrets, it is better they be for or about something you did - like move to another country or change jobs or whatever....rather than have regrets about NOT doing something
So it's better to have tried to do something - and regret it, rather than never having tried and forever be wondering and regretful of something never ventured.....
I did some volunteer work a few years back - visiting people in hopsitals/hospices who had terminal illnesses, and more than a few said of their life, looking back about regrets...That they wish they had been kinder rather than insisting on being in the right.
I do wish I had been a better son to my Mum (May She Rest In Peace) we used to argue like feck....2 minutes later it was all forgotten etc, but in my (wild) youth - I used to get into lot of mischief, and only now having children of my own do I understand the "HELL" I put her through....
Still all we can do is to try and do our best today and hopefully tomorrow it will be a happy memory ! <shrug>
