A lot of good advice in here. Some of which I hadn't thought of. When I first went solo I took a detailed photographic inventory of everything I carried. That way if something did happen no one would be wondering if things I left on the trail/dropped/etc. was from me or not. I e-mailed this to two or three people.
I also would never hike alone without a good pair of sticks, a cell phone in a waterproof sack with the battery out of it and without having a good look at some topography maps before I took off and an awareness of where I would go if something were to happen. I hiked the DRT alone earlier this year and the entire time I could see farms down off the Ridge. If worst came to worst I would head downhill.
At the end of the day hiking alone is dangerous. When I came off my Smokies hike alone this older couple chatted me up and when I told him I was out alone he says, "Isnt' that dangerous? What if you fall and break something?" and all I could say was, "Isn't driving in a car dangerous?"