I do my best to adjust to local time in the arrival city as soon as I depart. So, if it's daytime where I'm going, I try to stay up. If it's night, I try to sleep. And I definitely try to stay awake upon arrival until the "normal" bedtime. So, when I went to HKG a few years ago and landed first thing in the morning, I did everything I could to stay awake all day, hitting the sack at an early, but acceptable time that night. I find that this plan serves me well, regardless of which direction I travel.