I recently found myself in the same position by being in Asia while working for a European company. All my free time is in the morning without having to wake up early (in the dark). I go surfing or swimming/gym and then work 12pm-11pm with some breaks for lunch and dinner. I go to bed straight after working, which means I've stopped drinking. It's made a huge difference to my quality of life and I hope I can keep this up forever. Having to wake up and go straight to work seems like a depressing thought now.