I like my melatonin pills for that, but they only really work for me when going in the direction which causes you to lie awake at night... whichever I guess is east. But some say it is all bogus: http://www.nojetlag.com/melatonin.html
I am in Jordan and I have actually had intermittent connection over the day today. It is little use though since it does not last for more than 5 minute and no more than a couple of my contacts are connected at the same time.