This is something that's never far from my mind; the unknown sliver of time we have. I think about it when I wonder if I'm saving enough money for the long term vs spending it on some experience that will enrich my life in the near term. What's the point in saving for retirement if you could be gone in 20, 10, 5 years, or tomorrow? Everyone's idea of a rich and rewarding life is different, yet shares many commonalities: friends, family, work, recreation, and ultimately how those combine to define a rewarding life.
It's tempting to take my camera and do a similar, but different, collection of memories. If nothing else it's a nice web of memories to leave your loved ones and a nice side project that takes little time. Also, supposing you do live beyond 80 or 90 it would be all the more interesting.