Ooh, that's a tough one. *Weighs options carefully.* I'm gonna go with no food because maybe I'll get that much more accomplished then if I don't eat for that particular day.
Would you rather have 'Bird is the Word' or "What does the fox say' stuck in your head for one week straight? And believe you me, it's happened to me before. Both, although the first was only in my head for 2 days straight. :o