For cereal, I'd pick Freakies. Or maybe Kaboom. I've never had either, but if I'm going to have to eat mouthfuls of food coloring, I really want to punish myself, like cereal-self-flagellation. It will serve as a painful reminder of why I don't eat cereal. Also, one has a clown, and that's fun.

For song, I dunno if new-agey stuff counts, but if it does I'd pick something off Steven Halpern's 1976 magnum opus Spectrum Suite. Doesn't matter which song, they all sound alike anyway. I used to meditate using his music, so 50 times repeated wouldn't be difficult. Otherwise, maybe Eddie Murphy's Party All the Time song for maximum pain. Written and produced by Rick James!