I work a rotating 12 hour shift, and much prefer night shifts because I sleep so much better (I admit I'm likely an outlier).
Definitely darken the room, tinfoil should work great since it is short term.
If you have a basement (with good fire-escape options if you're safety minded), set up a bed down there (my bedroom is in the basement because it is much darker and cooler than anywhere else in the house).
Treat your night like it's a day. Drink coffee in your "morning". Eat breakfast before work if that's what you usually do. Pack a lunch, eat dinner when you get home (or while still at work).
I've never used a lamp, but ask if your work will buy one (it will save you the money and maybe it can be "checked out" by those who have to do this shift when required). I know my work would not do this, but the night shifts are part of my regular schedule, so I signed up for it when I chose this career.
Whatever your usual bedtime routine is, follow it as closely as you can. Someone else mentioned thinking of the same thing whenever you are trying to fall asleep. I have a similar method (it used to take me hours to sleep, but now I can usually fall asleep in minutes.) What I do is visualize every letter of the alphabet. It has to be "seared" to my eyelids, not just "think of the letter 'a'", but I have to conjure up the letter "a". I cannot move on to the next letter until the current one is completely formed. It's dumb, but it works. Usually I'm asleep before I get to "d". Some nights I have to go through the entire alphabet at least once. If I go through it twice, I know I'm not going to get to sleep anytime soon, so I might get up and do some laundry or something. The important thing for me is to focus completely on the letter and not let any other thoughts interrupt (I have had some hellish times that would have kept me up with worry, dread, whatever, for hours before discovering this). My pharmacist told me he tries to "see" a completely blank sheet. If anything shows up he has to "sweep" it away and try to keep it clear. Hopefully you have something that will work for you. It might take a while to make it work for you, but if you start now, it will be there when you go to the nights.