View from the Wing offers tips for combatting jet lag:
Adjust to the local time of your destination as soon as possible, generally as soon as you board your flight. That means eating on your new local time, and sleeping on your new local time.
Stay up until bedtime at your destination the day you arrive. If you go to sleep at noon, you’re going to be off for days. You need to force yourself to power through.
I regularly stay up until bedtime at my destination when I arrive even if I have to force myself to stay awake. Typically, I walk and drink coffee. It helps a lot.