A problem I see a lot with elderly people is an addiction to work and other future-oriented endeavors. It's hard to tell someone they're reaching the end of the life, that they're essentially done with planning for the future.
I was thinking about this because I saw this video (youtube/watch?v=byomo0C0LBM) that made the basic point that seniors are happier if they focus on living in the moment. It's hard though, I feel like some seniors are happier when they keep busy. I don't know, what do you guys think?