I used to travel 70,000 miles a year. There is no avoiding jet lag, there is only making adequate preparations to limit its impact.
I developed a program that worked for me based on experience:
No caffeine of alcohol on the plane.
Adequate water on the plane (which is more than usual since the atmosphere in planes is so drying).
An immune system booster before I take off and when I land. (I use Emergen-C.)
I always stay where I can indulge my exercise-of-choice routine. Regular exercise really helps. For me, that was swimming and/or walking.
If you do not have a medical condition that precludes its use, melatonin can help re-set your bodies rhythms faster.