colour sudoku
Warwick university researchers (in education) have come up with a version of Sudoku which uses colour as well as numbers.
I find this really interesting because colour is a right brain function so I would assume that playing this game will be getting you to think more right brain.
This is also interesting because other research on the size of the hippocampuses (hippocampi) [which is the area of the brain involved in location finding ability] of London Cab drivers suggests that stimuation of a specific part of the brain causes it to physically grow and perform better.
So maybe playing colour sudoku could develop your right brain thinking.