I did a rough paintover. Basically, the edge flow around the mouth was quite off. You want your edges to flow as smoothly as possible. You also don't want n-gons, like I said before. terminate the edges into other edges, which should be quite easy to do in most areas of your model. You also need to rely less on turbosmooth…
There are ways you can re-arrange your edges to make quads if you have tris, or ngons. It just takes a little thinking, almost like a puzzle. Just try to keep your lines flowing smoothly with an even distance between them. And like previously mentioned you want the shape to be pretty close to what you want before you…