Try this:
- Light pressure/contact
- Eyes parallel to the horizon, or simply keep head level
Look at others when they position behind the rifle. Is the head tilted? Once you start looking for it, you'll see a lot of shooters with head cocked.
Moto riders are familiar with keeping the head level. In a hard turn, eyes are level with the horizon. Not tilted with the lean of the moto.
The head tilt and neck craning to get into position is one reason I have gone to higher rings.
That reminds me, an often overlooked issue with "cheek weld" is the shooter has to push the head into an unnatural position. Whenever setting up a gun with someone from scratch, I always start with length of pull, scope height, and then set the scope for eye relief.
Truth is, after I did the above for me, I haven't had issues with cheek weld, because my head is in a neutral position behind the gun.
Also, there is a difference in prone (pushes the head forward towards scope) and other positions where the body is upright (pulls the head back away from the scope. To accommodate this, I set the scope relief so that when prone, it is at one extreme and when upright it is at the opposite extreme. There is also a difference between where you will index your face on the rifle between the two.
Some people will set a hard cheek weld seated, but then when prone they can't push their face down enough to get the sight picture. Get a camera and take some pictures of yourself and face on stock in prone and seated and you'll see what I mean. Because my hunting shots are rarely prone, I have started setting my hunting rifles up for upright shots.
If you set up your rifle so you can shoot naturally, you will never have to hunt for the scope view and a simple light touch of your jaw or cheek to the stock will index your head into the same position.