Stay awake until a normal bedtime
Few things are harder to resist than the post-flight nap. Maybe ice cream. Or Instagram. But resist you must, because passing out when it's still broad daylight out is a bad idea. You're not giving your body a chance to adjust to the local time, which throws a serious wrench in your sleep cycle. "In order to sleep the night, you should stay up when hitting your destination," says flight attendant Kamiana Domingo. "If you must nap, take a quick one no longer than an hour, because anything after one hour makes you more tired."
And don't sleep in
When you do finally get to bed, conking out for 18 hours straight will effectively undo all the work you put into staying awake in the first place, and that would be foolish. Instead, set your alarm for a reasonable hour and make an appointment to be somewhere in the morning. Even if you're a little sluggish, waking up earlier is better for your body in the long run.