We each have different ways to deal with sleeplessness! I have found that how much physical activity each day has an effect on my chance to relax at night, as does what I may have eaten or drank that day. With my health issues, sometimes there are deep pains, or muscle cramps in the middle of the night. Those will wake me up, sometimes needing a few laps of walking around the house. If my husband is having a difficult night, he will take a hot shower.

And let's not forget about the way our minds may not shut down. Doing some journaling, or meditation helps. Cuddling with my cat helps bring the blood pressure down.
Ginger