I don't have any pictures online right now of what you are having trouble with, but those are some of the harder things to draw. I can post some for you though If you would like~
I have to agree that profile views are one of the hardest things to draw. Once you get it though, it will just come naturally ;3
I'm just going to say, that you want to keep the mouth completely within the lines of the face, and if you try looking at the profile of someones head.
and this video may help you:
http://www.youtube.com/watch?v=3UuA7gbT1_MI personally don't like his techniques too much, but I think it will help.
and all this reminds me I need to up date my deviantart.....