This is a phenomenal chance for Dean to showcase himself in three different ways:  As a policymaker (debate); as a thoughful person (Sawyer); and as a fun, regular guy (Letterman).  He just has to be careful that the mindsets from the three forums (fora?) don't meld together.  In otherwords, he has to make sure that "Debate Dean" doesn't show up on Letterman, etc.  I'm sure he knows this, but it's a pitfall.

Otherwise, tonight could be Dean's best shot.