i find it much easier to either just shade hair... or draw the main details, kind of like the ribbon thing that QT posted.
Also i was going to say... comparing the shape of the face, well i feel the chin should be rounded off more, I mean you drew it more realistic then a cartoon but its still got that style shape, you know?
I think the face could be a tad longer as well.
dude i have the same kinds of issues lol