General Mills has a Facebook app, called Tablespoon, where you can get free Chex mix for taking a 16 questions survey about your “food personality.” Wait, I have a food personality? How many freaking personalities do I have? It's already a little crowded up in my head.
The site is going a bit slow right now. If you get an error message, just refresh the page and you should pick up the survey where you left off.