Things that can be cured by a nap:

A side stitch so painful that it will only allow one to sit up-right and cross-legged

I managed to lie down and take a half hour long nap. I woke up and it was gone.

Heartbreak

For the first few minutes after waking up from a nap, I only think of one thing, 'What time is it?' Then I think, 'Man, that was only a half hour?' It's only temporary cure, but for that moment you're innocent.

Boredom

One half hour that I won't spend watching Crossing Jordan and cursing my existence.

Sleepiness from staying up until 3 AM the previous night

So, I can stay up until 3 AM tonight...