Use masking noises at night to help distract your mind and sleep, a good starting place is:
http://mynoise.net/
Also: exercise, exercise, exercise. It helps tremendously with stress, anxiety and definitely helps with sleep quality.
Other than that, and without going down the slippery slope of sleeping medications, I would recommend trying to supplement with something like melatonin first. You can't buy it in stores here but you can grab it very easily online, I personally use eBay and buy the Optimum Nutrition brand:
http://www.ebay.com.au/itm/Optimum-...111?pt=LH_DefaultDomain_0&hash=item41761e8217
I've bought it off these guys many times and I've never had a problem, takes about a week and a bit to arrive.