Psychologically there are two dangers to be guarded against in old age.  One of these is absorption in the past.  It does not do to live in memories, in regret for the good old days, or sadness about friends who are dead. One’s thoughts must be directed to the future, and to things about which there is something to be done.  (Bertrand Russell, How to Grow Old, 1975).

It’s healthy to have projects, preferably ones where you don’t have to make money (for the sake of peace of mind). One such project could be writing up your experiences for the benefit of your family. I did this, made it into a book called ” The Things I Haven’t Forgotten” (not on Amazon!) and thus purged my mind of things in the distant past that I no longer have to dwell on. It was like drawing a line under your life so far. Hopefully a grandchild will get a laugh out of them years hence. So now I can concentrate on keeping fit and planning future projects, working on them with my wife. This is an Epicurean piece of advice, hard work to put into effect, but a useful one.