I try to keep a schedule. I am up at 6am. I am in bed at 9pm. If I am not sleeping, I am at least resting. Of course sleep is more precious than restful awakeness, but I can only do what I can do. If I spend a sleepless night, I will spend the next day doing quiet activities or restful things. I try to not indulge in nap after nap or I wont sleep the next night.

I have found meditation, and the good night feet, good night legs, and so on style chat with myself help. I also practice "sleep breathing" we all change our rythmn of breathing when we drop off. it becomes deep and has a pattern. I fake that, and sometimes its enough to trick my brain into going into dream land.

Im sorry you struggle. sleep is so important.