Print the image, take it with you to BlizzCon, and mark off the squares you experience first-hand. When you mark five boxes in a row, you win! What do you win? The greatest prize of all: absolutely nothing. How exciting!
Let's be honest, here: Most of you are going to turn this thing into a drinking game. That's cool and all, but please, mind your health (and that of others) when you sit down Friday night and realize you've checked off nearly every square already.