Wow, that can't be a lot of fun!!
Some tips or suggestions, unless they're already old and ineffective for you:
Get at least 30 minutes of pretty darned hefty aerobic exercise daily. That means each day. Strenuous walking, cycling, running, skating, skiing, games on a team...something that makes you sweat, have to cool down, and then get cleaned up to do something else your mind must contend with. Don't do it after 1800 hrs, either. Best early morning, even before breakfast, do it at noon while others eat (you can eat later or at your desk), or right after work.
Don't eat anything after 2100 hrs (9:00 pm). Ideally, don't drink anything after about 7:00 pm, and be sure to void prior to retiring.
Don't use any screens. No surfing. No youtube. No texting or...EGADS!!...work-related stuff. Don't sleep with a pager or your phone at bedside. None of this after 8:00 pm.
Have a hobby for distraction. Get into it at least twice a week, and intensely. Fix something. Paint something. But it has to be something you love to do.
Take 10-20 mg of melatonin two or three times a week, never on consecutive nights. You can habituate to melatonin the same way you can to nicotine. You take it just before bed. It's best taken on weekends when you know you can sleep in a bit to catch up, but going to be a bit earlier than normal so that you sleep longer is also an option during the week. If you're retired...it's moot.
Not only is it important when you eat, but WHAT you eat. Anything that has you belching with heartburn just before bed is a huge problem. In fact, if you have GERD, gastric reflux, you'll have to address that as best you can.
I'm always flabbergasted by how many people drink coffee late in the day and into the evening. Don't...if you do. Even so-called 'decaffeinated' teas and coffees have some caffeine in them, and other compounds that contribute to GERD or arousals. I also cautioned against drinking fluids after 7:00...remember?
And, not just coffee, but anything else that contains compounds that stimulate your brain, your central nervous system, or your kidneys. Chocolate....yeah, I know....but just don't. Not later in the day.
Did I forget exercise? Daily?