Maybe the only time when it's legitimately fine to take melatonin. 

 I agree. Only time I use it 

 Café, dormir. 

 Use app Timeshifter 

 Don’t sleep until its time to sleep were you are, you get tire but it help me 

 Don't nap, push through until the evening.

Get up early enough to catch the sunrise & go an look at it. 

 bare feet on carpet and water 

 Rigorous exercise immediately upon arrival 

 Don’t drink alcohol. Lots of natural sun light 

 Sorry. Bit too late now. But you can prevent jet lag by going to sleep and waking up at certain times specific to your destination. 

You can use the Time Shift app to calculate these 😅