What I have had luck with is in hanging out with people both older and younger than me. I am in a band with guys in their mid 60s (except the drummer, who is in his 70s... and his old band got together and was able to open up for the flaming lips this last may... how cool is that!!!).
These folks are older than my parents, but you can see how much longer you're going to live when you know that hey, people in their 70s are often still working on the same kinds of things that I work on.
It helped me realize that not only do I still (possibly) have another a whole other lifetime ahead of me to do a bunch of things that I wanted to do, but I can actually make progress even slowly if I work on things a bit every day...
it is a lot easier to spend a bit of time getting to really know a scale on the piano when you realize you still might have another 40 years to enjoy your fluency with it.
If you plan to keep getting better at things throughout your life and know that you may have the time to enjoy using a bunch of skills you acquire slowly, then that last half of a life appears to contain just as many possibilities as the first half.