I would add to what was said above - exercise and good diet and *time*... all of these things will help. I always sleep better when I'm exercising regularly. I, too, would recommend trying something other than Ambien if the potential exists for it to become addictive. A note of caution on the melatonin - if you have depressive tendencies, I've read that melatonin can worsen it. I'm not a doctor, so I'd say to check out anything you choose to take very carefully.
good luck, and congratulations on 10 days!
--anne