I found this really interesting article on MSNBC.com today about the grown in the "brain fitness" game industry. Revenues in that market more than doubled between 2005 and 2007, in part because of the large number of baby boomers being proactive about their neurological health, and apparently there is evidence that challenging, with training games for example, "can stave off the cognitive decline that comes with aging. ":can stave off the cognitive decline that comes with aging."
Click on the post title for more information. In the meantime, I'm going to look into some of the brain training games myself.
Very interesting. I've been coming across a lot of organizations that are peddling similar cognitive sharpening therapies but through the power of meditation, which supposedly allows you to access areas of your brain that you wouldn't in a normal state.