why not have a look at this http://boards.cannabis.com/showthread.php?t=11776 this usually works for me mate.

Smokin wont solve your problem mate, i tried this too and because your stoned your mind is full of stupid ideas and thoughts you never manage to stop thinking properly. Just drink lots of water to flush your system out and get into a routine of going to your bed at the same time each night.

Hope this helps mate