Complete puzzles. Puzzles sharpen the mind and test your ability to figure out answers by using visual and verbal clues. Any type of puzzle exercises your brain, including Sudoku, crossword and jigsaw puzzles.
Work on your sense of perception. Exercising your five senses should be a regular part of your daily routine. Try to recall things by using your senses. For example, attempt to identify foods through smell alone. Another exercise is to study an object on the street and then draw it from memory an hour or more later.
Use your mathematical skills. Exercise mentally by working out quotients in your head. Estimate the measurements of household objects and then check your accuracy afterwards with a measuring device.
Exercise your reasoning abilities. Both strategy games and card games fine tune your reasoning skills.
Try new things. Exposing yourself to new experiences exercises your brain.