If I were on my death-bed right now the one life lesson I would consider is: That life can never be planned.
Looking back on my life today and how I had planned it. There is no real comparrison. I now live in the USA, never even thought of leaving the town that I was born in, let alone moving across the world. I had thought of marrying in my twenties, in the end I was over forty before I married. I planned on working with animals, I ended up working in a library, with a very long time in retail. I never planned on going blind, it happened. As things go it seems I may not be good at planning. :)