Ok sweetie, here are my suggestions: (I really want to help);
CAFFEINE baby! yea, sadly, I have to use it to get thru nightshift...hopefully, you don't.....
Sleep w/a while noise machine or fan to block out neighborhood and/or household noises that may disturb you. I know how it is, I have two kids and dogs...I have to block out the noise somehow.
Phone off; answering machine on LOW vol. NO call is that important unless it's an emergency. And they will get to you, if it truly is.
Darken the room with dark shades, sheets or something. It's a must. Keep said room COOL but not cold, if possible.
Eat a light meal before bedding down; cereal w/milk helps me. Toast maybe, nothing HEAVY. Make sure your bladder is empty at bedtime. I find when I wake up to pee, I am wakeful after that.
Make sure all people you know-- KNOW damn well you need your sleep and not to call unless dying or life/limb are at stake. After all, would you call THEM at 2: 00 a.m. to "chat"? This includes where you work. And my friend, that is a challenge. They often do NOT hesitate to call at 1:00 for "something important" Reiterate unless they want calls at 1:00 a.m., that you want your sleep respected in a similar way. Learn to guard your sleep carefully; teach others to do the same or you will be sorry.
Put a sign on the door asking visitors to refrain from ringing the bell. Or else, do what I had to; disconnect the bell; cause it seems many cannot (or will not) read.
If you have a dog that barks at all that moves, good luck. Maybe bedding him down in your room w/you and the white noise will help...it does me. My dog hears nothing over the box fan I run.
If the above fail, ask your doctor about OTC sleep aids such as benedryl (non-habit forming for most) or Melatonin. These were musts for me when I was on fulltime nightshift. But I am telling you to ask your dr first...ok?(grin) I don't have a license to practice medicine, IYKWIM.
Take darn good care of yourself. You are all you got. Stay well- hydrated on your shift as possible. Reduce caffeine intake after 2-3 a.m., if you use it. Take your vitamins; eat well (challenging on nights at times). If you don't you will fall apart FAST.
Good luck! Hope this helps you!