Fight Against Alzheimers

I have been told that I am 40% more likely to get Alzheimers because of my two near fatal vehicle accidents in which I suffered Closed-Head-injuries. Because of the brain bouncing around and severe concussions.
I have read much on the topic and found all specialists recommend crossword puzzles and other brain games.
Basically, they say, the brain should be treated just like another muscle in your body and you should exercise it or as said you can 'use it or lose it!'
Because of this I am doing my best to change me passwords to various website more often. It's the little things like that I am sure will help. I read Terri Garr's book Speed Bumps where she speaks candidly on her MS issues and how she spends a large amount of time playing Freecell on her computer. That started me doing it to...Well maybe not lots of time, but while having my coffee and before I read my paper I try to get in a few games of it.
Alzheimers steals ones dignity and all of us should fight the good fight to reduce the chances of succumbing to it!