Hi Minyan, glad you got that second chance. Welcome.
If I had a second chance, I would spend that last Shabbos at my parents’ house 17 years ago for my birthday, instead of putting it off for the next Shabbos, “because the kids have colds.” It would have meant my children would have seen their Zaydie one more time. He suffered a massive stroke on Sunday and was niftar on Tuesday, and the hospital would not allow them in to see him, even if we would have thought it was a good idea (it wasn’t, with all the tubes in him). That is the biggest charatah of my life, though there are some other things that I would change, as well.