Nice start. Do you have any concept artwork?
I cannot tell what program you are using, but you should make sure your mesh edges flow so that your smoothing doesn't get messed up like in the neck. What this means, is look at you model's contours. These are the lines the flow down your entire mesh. There are vertical lines and horizontal lines the run on the surface. Make sure the lines stay consistent if you can to avoid breaks in the smooth surface.
I cannot see well, but you might have to do some welding or edge rotations to clean things up.
IDIC (Infinite Diversity Infinite Combinations)