Most of us don't want to think about cognitive decline, although this happens to many of us as we age. But brief mental training sessions can slow age-related mental decline according to a new study.

This seems pretty obvious to me -- keep the mind engaged with a variety of mental exercises -- every day -- and the breakdown that generally occurs in the mental state as we age slows down (or even stops to a point).

This new study came from a five-year study of more than 2,800 Americans aged 65 to 94. The training given to the participants was short -- just 10, one-hour sessions for most participants, with eight booster sessions for some. The benefits of such training lasted at least five years. Now, that is impressive.