Xanax
Biggest advice is set your phone or clock to the time it currently is at your destination. You plan to go to sleep when it is nighttime at your destination. It will minimize jet lag when you get there.
If you need to, wake up early and minimize caffeine on the day of travel to make going to sleep easier.
YouTube channel ‘It’s the Kelly’s’ has a video on how to minimize jet lag.
I haven’t been to the US yet, but I’ve done the Aus to Europe via Middle East layover run a few times, so ~22 hours flying, 14 being the longest in one go.
Anything you can bring to make yourself more comfy is a big win as you will be more likely to drowse. I find I need lumbar support and something to rest/hang my feet on like a strap; there are all sorts of things on Amazon to help with both of these. Eyemask and earplugs (or noise-cancelling headphones with music or a podcast/audiobook) are must-haves.
Don’t schedule much for the day you arrive, you’re likely to feel smushed, bloated, and tired, so take the time to rest and shower, and try to go for a light walk while it is still daylight as it will help you adjust (maybe walk to dinner or something). If you desperately need a nap then do it, I don’t believe in ‘pushing through’ but make sure you set alarms and force yourself up and do something in the late afternoon and evening, then have an early night to bed.