There are books like ‘While we sleep’ which can give you some insight into the complexity of causes and effects and even this book was heavily criticised although the author did some actual research with cited sources etc.
And I’m saying this as someone who had major problems with sleep for more than year, but now sleeps daily an average of 7-8hours.
The only thing actually recommendable (IMHO of course) is to not force yourself into sleep, as this may very well backfire. Laying still and stuff like that is a rather forceful technique. For hyperactive and hollering people (with ADHD and alike) it may even amount to torture.
All the CBT that you can apply is NOT universal. Techniques such as not eating too much, not drinking alcohol at night, cooling the room, counting eyes closed, doing exercise, having blinders, doing meditation if you want… are absolutely NOT universal and what works for someone may actually be bad for you and me.
In reality the most common advice - to meditate before sleep - may result in contrary results. Courber intuitively there is evidence that sleep deprivation may actually help depression, rather than forcing sleep patterns.
Please consult sleep experts, rather than consulting random articles although they may seem plausible.