Shigeki reminds us to keep our minds sharp we must exercise them them. Shigeki bought a very cool calculator that quizes with math problems. I used to do the same thing daily with Yahoo's daily math problem.
Reading is another way to keep our minds sharp and not lose vocabulary. When was the last time you picked up a book?
In related information, a government study on Fish Oil and Alpha Lipoic Acid in Treating Alzheimer’s Disease has been done. (Wow! 10268 studies currently recruiting volunteers!) Fish oils help fight dementia and help the brain.