I read a great memory book when i was in university and have found it very useful since then. Well, perhaps not extremely useful but fun to use sometimes when you really need to keep something in mind.
Kinda interesting was the fact that it was co-authored by Jerry Lucas of NBA fame. Take a peak -
Memory book.
Basically I can memorize a deck of cards, and i know the 50 states in alphabetical order (and their capital city too hahah).
but ya, anything you can do to exercise your mind is good - and it benefits your poker game too - no doubt.
READ this article too. It speaks of patterns in poker. Once you get to a certain #hands played you will find it easier to recognize situations and not depend so heavily on your deduction and brainworks...you can go straight to experience.
This is partly why so many young multi-tabling internet players have made such fast leaps and bounds - their recognition of hands is so high from shear volume.
i hope this helps. GL