General: Drink a shitload of water and eat green things.

Morning: take a multivitamin, vitamin D, and either sublingual B12 or methylated B-Complex.

Throughout the day: take electrolyte supplements like potassium gluconate, magnesium citrate, or drink Gatorade or equivalent in place of the caffeine. I've tried Liquid IV more recently and subjectively it does feel like it works better than standard sports drinks. Light therapy can also help if your work environment is conducive to it. The good lamps are kind of expensive, though.

Night: limit use of glowy screens for an hour before bedtime or use a blue light filter / night light type application or system setting. Take ZzzQuil, melatonin, and if you're not opposed to it, try to supplement weed for at least some of the alcohol. Indica edibles are the best for sleep for most people. Be super careful with the dosages at first because as Snoop Dogg put it, that shit ain't got no off button.

Do you snore? If so, you probably have at least moderate sleep apnea. Ask your GP for a referral to a sleep specialist. You don't have to stay overnight in a lab anymore, they have a little kit they send you home with. All of the stuff I've listed above is what I tried before realizing the apnea was the main problem, and it all worked to varying degrees. The CPAP has basically given me my life back after decades of not realizing how shitty the quality of my sleep really was. It made the biggest difference, but I still do all the other stuff and most days I feel like a fucking superhero compared to my previous self.

I hope this helps!