According to a new study published in the Archives of Neurology, eating fish helped older folks keep their wits about them. People 65 and older who ate fish once a week showed a 10 percent slower rate of cognitive decline per year compared with those who ate no fish. Those who ate fish two or more times a week showed a 13 percent slower decline. Why wait until 65? Why not start now? Fish on Fridays... and then some. [via the New York Times.] *Don't forget to consult your Guide to Ocean-Friendly Seafood before visiting your neighborhood fish monger.