My personal anecdotes are many but most of the elderly that I knew to be highly active, sociable and of sound mind were people who did stuff that was engaging a

My personal anecdotes are many but most of the elderly that I knew to be highly active, sociable and of sound mind were people who did stuff that was engaging and social. The only real limiting factor for the elderly that I knew well was when they had health problems (falls, stroke, heart attack, etc.) that they didn't recover from due to age. I would suggest that if you see retirement in your future then getting a long lasting hobby (gardening, wood working, etc), a simple side job or even volunteering (hospitals need volunteers for so many things) to make retirement a period where your mind/body is used.