How physically active are you during the day?
It usually takes me hours to fall asleep at night, but if I do lots of exhausting stuff like running during the day so that my “batteries are depleted” when I go to bed, it’s much easier to fall asleep.
Or do you have trouble going back to sleep when doing WBTB?
Many say that WILD should be combined with WBTB.
It’s a brainwave generator. Here’s a thread about it