Any tips for staying mentally fit?

 Q:  Mr. Pedometer, you always encourage us to exercise our bodies, but how about our minds?  Any tips on how to stay mentally fit?

A:  I recently read an article entitled “How to Become a ‘Superager,'” by Lisa Feldman Barrett, a professor of psychology at Northeastern University.  She asks, “Why do some older people remain mentally nimble while others decline?