Mirtazapine
"I have suffered from insomnia for the majority of my adult life.  It seems like my mind does not want to slow down.  I now take 30 mg of Remeron at bedtime, and I must say that it is an amazing medication.  I do tend to be a bit groggy when I first get up, but like the post earlier, it is nothing compared to the "walking dead" feeling that insomnia gave me.  I highly recommend it."