Wife and I are 86 and 83 respectively.
Crosswords, reading, walking and travel seem to keep us mentally alert.
Not too much television seems to stop brain 'Zombyfying' as well.
Chat with younger people.
We are lucky to have grandson and family nearby, and we regularly speak with him and his teenage senior year class mates.
Health Warning.
Avoid old people as much as possible.
Research has shown that in some cases, over exposure can cause brain damage!
