>>46818
The same way I do most body related things, by attention.
At all times being aware of my teeth, my jaw and my face. Eventually you begin to notice the morphogenetic/magnetic field of your face, when that happens you will have the knowledge necessary to apply the next step.
When you know your particular fuck ups you need to combine will (or however you prefer to call the power of mind over matter) to change the magnetic field of your jaw/teeth, and combine it with physical action like doing things that relax your neck and jaw muscles, constantly putting your teeth in place and closing the mouth properly so you actively change the morphogenetic field.
There is also the psychological aspect of it which you must become aware of and solve if you want to have any success doing it. For instance, I've been working on my neck for about a year now and only had minor success because my psychological "mechanisms" related to that area were so fucked up for years and to some measure still are. Been an "introverted semi-autistfag" for a long time.
I have a theory that Greek sculpture wasn't necessarily some group of artists wanting to create something perfect just so they can have a statue of the gods they prefer. I think that their striving for technical perfection and their ideal of perfect beauty was really just a way to show how the human being becomes when everything about him is in accordance with divinity.