I slept when I was tired and ate when I was hungry. If is 2.00 am local and your body thinks it’s 4pm somewhere else, you can’t fight it.
I used to tell the Purser… my job is to keep you happy. A happy Purser is a happy crew. We used to do trips up to 21 days long. You don’t want to be away with an unhappy crew for 3 weeks!
Have fun…I used to say ..there is a big difference between taking your job seriously and yourself seriously. And remember .. sometimes the journey is the destination and it does not matter where you are going, it’s who you are taking with you!!!
And all of the other posts offer excellent advice.