Symmetric wolf head tutorial

There i gathered some tips on how to draw a wolf head. I used to find it hard to draw wolves mouth open or head from different perspectives. Also I've found some tips that really help me make the wolf head look symmetric. Hopefully some of you guys find these useful instead thinking I'm crazy D: I went trough some of the other tutorials on wolf head, but didn't find anyone drawing the way I do. 
The most important thing for me at least is to start the head from drawing the nose and mouth. Then i set the eyes. Many people start from the eyes but then the nose will end up pointing in random direction! Unless you are very experienced in drawing wolves ofc... ^^
Next thing is drawing those additional lines I have there. Even adding them on complete drawing and meditating on the shapes was very useful for me when I was learning to draw human face. Same goes for anything really.