Quote Originally Posted by Licity View Post
Or you could just play Tetris.
I second that, either Tetris or Guitar Hero.

Quote Originally Posted by http://en.wikipedia.org/wiki/Tetris_effect
... People have also experienced this effect after playing music games with scrolling notes, such as Dance Dance Revolution, Rock Band, or Guitar Hero. Fans of the game Polarium have had images of tiles being overturned in their mind, or feeling as though they needed to be overturned. After playing bullet hell games, many players have reported that looking at small objects, such as letters on the page of a book, appear to be moving around or swirling in patterns. Also the Rubik's Cube may make a person imagine turning the sides and the colours in their minds after playing it for a prolonged period of time...