Looking back, this may be one of the most valuable and least recognized lessons of Tetris. Over time, your mistakes pile up (inside the minds of those around you), but the accomplishments are forgotten. It is sad, but true. This means that you need to be constantly accomplishing things in order to prevent the mistakes from stacking too high. Well played, Tetris. Well played.
UPDATE: Let's try a different picture, since the first one didn't want to display... from George Takei's facebook: