spoony....there are several ways to help the problem but you really need to think about this from the standpont of "why is the shadow there" .... seriously.... why is it there ? .... its a byproduct of basically 3 things....
#1 where your light is comming from
#2 size / intensity of the light source
#3 ambient light
in your photo you have a small intense light source comming from above with little to no ambient light in the photo ....thus the harsh shadow
as others have suggested a bounce may work better depending on size/height of your celings and size of the room you are working with ...
Keep plugging away spoony your on the right path..