They're very different from migraines (which I had as a kid), in that there's no visual effects or nausea, and seem to be more localised and less "systemic". I'm always trying to work on my sleep, with very little success overall. I've never tried any of the serious sleeping pills, they seem too risky; but a combination of restavit (an antihystamine) and melatonin can get me to sleep pretty reliably, the problem becomes that it sometimes leaves me a bit too slow and stupid in the mornings.