Joint. Don't need to pack it; Geneva convention style will do.

(though I generally only use it when the headache is pushing towards affecting ability to function),

I've heard putting a rubber band around your head works for some causes, because of blood vessels constricting, or something. Actually, someone I knew swore by it. Sometimes a hot shower can help, if it's a sinus thing, just because the steam helps soothe that kind of thing-- same with a bath, which is also relaxing. Or just drinking a glass of water or having something to eat-- I've had headaches brought on by mild dehydration or fatigue, or overhunger, before. If all else fails, a nap often gets rid of headaches, too.

It tastes like puree of hell, but it works.

I find a bottle of water, some ibuprofen, and a ham sandwich always help. (I doubt the Hair of the Dog principle works on regular headaches)

First, get a book, and find a comfortable place to read it. After a while, you'll start to get bored. When that happens, just put the book down and try to fall asleep. When you wake up, the headache should be gone!

Ibuprofen + sleep usually does it for me.
Always trust in the power of pharmaceuticals.

Usually helps me. Granted, most of my headaches are dehydration headaches, but still...

And some Bleepka.