I was told there really isn't a 'cure' or way to prevent jet lag but, it turns out, someone has come up with a solution:

The Argonne Anti-Jet-Lag Diet is helping travelers quickly adjust
their bodies' internal clocks to new time zones. It is also being
used to speed the adjustment of shiftworkers, such as power
plant operators, to periodically rotating work hours. The diet was
developed by Dr. Charles F. Ehret of Argonne's Division of
Biological and Medical Research as an application of his fundamental
studies of the daily biological rhythms of animals. Argonne National
Laboratory is one of the US Department of Energy's major centers of
research in energy and the fundamental sciences.

I'm going to play skeptic on this until I have to travel again but I'll definitely try it.

via Kottke