For headaches, I like Excederin. It has actaminophen, aspirin, and caffeine. I figure that coctail increases the odds of helping a headache. They also have the disolving tablets for taking with no water (although plenty of fluids is always good). The downside to Excederin is that it is expensive. I haven't seen a store-brand version.

Also I like the single-use instead of bottles because they don't rattle, but then you're stuck with the trash.