Some activities that improve brain function are solving math problems in your head, learning to play a musical instrument and learning a new language. Applications for mobile devices that enhance cognitive skills include "Lumosity," "CogniFit Brain Fitness," "Brain-Trainer Special" and "Happify."
A good activity for improving memory is to memorize a list, such as a grocery list, put the list away and in an hour check how many items on the list you can recall. Learning a new language stimulates the brain, and scientists believe that it can reduce the loss of cognitive function. Word games and Sudoku are other good activities that stimulate the brain.