I have dealt with difficulties falling asleep. For me, a powerful approach was to ask, what's stopping me from calming down and letting go?

Being able to do let go before you hit total exhaustion takes surrenderence, which is built on a certain security. Or bitachon built on emuna if you want to term it jewishly. Going to sleep is an act of relinquishing control.

When I'm in a good life rhythm and I'm taking care of myself right, even if I'm dealing with various challenges, I can trust my inner voice to put things aside and end the day, not needing to escape the thought of tomorrow, either into racing thoughts of planning things, fantasy, or p/m/both.
With this inside security I don't need to force myself off devices, or other such things. Of I'm not dreading tomorrow, it isn't hard to let go and get there.

One practical thing that helped me was going to sleep at same as my wife. It gave me that extra bit of wholesomness that aided me in letting go. If I would stay up after her it would get harder.