Try to do light exercises few hours before you sleep. Good blood
circulation to the head will relax the muscles there allowing you
to sleep better.
Alternatively get a magnetic sleeping system: pillow + bed pad as
that's what it does, improves blood circulation.
If you can afford it that is.
PS: I'm not in any way affiliated with any MLM companies selling
those stuffs. Nor do I condone their selling methods. However I do
own a set of it for over 2 years and it has helped me get a better
night's sleep. + $$ dollars poorer.. 
