jet lag is a bitch!
Get some Melatonin from the health shop (vitamin section) next time you are near one. Take as per instructions (usually one tablet before sleep at your normal sleep time) and you are re-synced overnight! Works well for most people, including me.
Melatonin is a natural hormone.
http://en.wikipedia.org/wiki/Melatonin
Used to have to get it OS, but it is now available here.