I've suffered from insomnia since I was a teen. I would say stay as far away from sleeping pills as you can. For me, all they do is make my body sooo tired I can't move yet my mind is racing. Was like toture! At the moment I go bed at about midnight and up at 6 for work, I sleep some of that time!
Nothing has worked for me really, people recommend alcohol or a milky drink- even if not on a VLCD they don't work! I do put lavender oil on my pillow sometimes, that's soothing. I got a copy of 'I can make you sleep' by Paul McKenna at the library but have yet to use it, will report back if it works!
Have to say though, I am a lot less tired on S&S- I used to have to be careful not to sit down at lunchtime as I would get sooo sleepy but not sleep. Hasn't happened since I started S&S!