This is the best of all possible worlds - the one that you find yourself in right now!
I can't over indulge a tendency to rethink actions or choices made long ago - it usually tends to make me sad and miserable thinking that I might be better off today had I done x instead of y, or married Jane instead of dumping her, etc. etc. But, I might also have ended up going bankrupt, divorced, or dead by now, too! So, as Monte and Mike point out - as long as you're on the top side of the dirt, have a home of some sort and a motorcycle to ride, things really are pretty good, and it is, in fact, a wonderful life.