I've have sleeping issues for a few years and it's actually gotten better recently. I go for months of good sleep, then bad sleep, etc. I am actually up now because I couldn't stop coughing from this irritating little cold I have and woke myself up twice since going to bed early.
I've tried several things...
Remeron - don't remember dose (BEST sleep EVER, but side effect was food cravings constantly and I have to watch my weight)
Trazadone 50-150 mg (Worked for a time and then stopped)
Seroqel 25 mg (Worked for a time and then stopped - also left me feeling a little hazey during the day)
Ambien 10mg (Have taken ONCE last night and was the weirdest and worst night of sleep ever)
Tonight, I took Melatonin, had better routine before bed, and took half a dose of Zzzquil (My favorite, but dries up my lungs so I rarely take).
I struggled with anxiety and depression and suggest a variety of techniques to help with sleep. I sleep around the same time every night (8-9PM) and wake up the same time every day (4-6AM). Here are some good websites to help that I was reading about today actually:
http://www.helpguide.org/life/insomnia_treatment.htm
http://www.wikihow.com/Prevent-Insomnia
Also, I use something my counselor suggested on iTunes called Relaxation Body Scan & Guided Imagery for Well Being by Carolyn McManus. I listen to it when I get in bed to help me relax. I also go to bed clean and try not to go to bed with a full stomach. Don't worry so much about it and know you can get some good sleep, it may just be you changing your ways a bit.