Train the body as said.
Eat and drink everything that is good for you, cause if ever there was a time to treat your body like a temple THIS IS IT. Put little to nothing in your mouth that is not beneficial and truly nutritious. There is a strong urge/craving on nights to eat lots of empty carbs and drink way too much caffeine. Don't fall into this trap. Drink lots of water, eat lots of fruits and veggies as well as grains. Leave the donuts and coffee out. Really!
Work out when you can. Healthy body and sleep are enhanced by walking, aerobic exercise and weight lifting. Find a time to carve out for 30 min/day 5 days a week. Your body, whether on day or night shift, will thank you.
Make sure others respect your sleep. This means teaching your family members and friends, as well as WORK, not to call you during the day. If you can, unplug or set all phones to silent and turn on the answering machine. If a sign on the doorbell does not work and they still ring it, then disconnect it (I had to).
The idea about white noise: EXCELLENT. When I was working mostly nights, I used a box fan on medium to block out the normal noises like dogs barking, kids playing and the noise in my home to sleep. And blackout shades or curtains a MUST.
Keep the room cool. If you don't have AC (like I did not), get a room air conditioner. I always slept MUCH better in a very cool and dark room.
Eat a light meal before you lay down. I always ate a bowl of cereal or toast and some milk. NOTHING heavy or too sweet. Just light meals will do the trick so hunger does not wake you up too soon..
Take a warm shower or bath before bed. This does wonders.
Put your nightshirt/sleeping clothes in a clothes dryer right before going to bed. The warm cuddly feeling of a flannel nightshift is like opium for me, helping me to sleep. Also helpful, particularly in cool weather, a heated blanket or heating pad. Really does the trick.
Also I used lavendar sprays and potpourri----just a light mist or amount of lavendar really worked well for me.
A cautionary piece of advice: BE REALLY CAREFUL about using "sleep aids", esp Rx ones like Ambien, etc. Seems to me, nearly 80% of the nightshifters I worked with used these things (especially prescription sleep meds) and even if not physically-addictive, can be habit-forming and mentally-addictive. I would be careful not to fall into that trap, if you can. Instead, taking good care of your body and making sure you take the time you need to sleep is the best way to go, if at all possible. Staying off meds can really pay off health-wise.
Some people love night shift. I know many who would work no other shift. It just was never for me.
Take care and enjoy your new job!