Hi Wiix

I used to have insomnia with no underlying pathology.

Sleep hygiene (which both Caroline and DejaVu have mentioned) works for me.

Another approach is Progressive Muscle Relaxation, which you can do lying in bed. Essentially it involves tensing and then relaxing each set of muscles in your body. I do it moving "up" - toes, feet, calves, thighs....neck and facial muscles, but the order does not matter.