Think of high rates (if you have doubts asking for it or doubts paying it) as:
————————————————
$1 to turn the screw
$9,999 for knowing which screw to turn ——————————————-
$10,000
————————————————
$1 to turn the screw
$9,999 for knowing which screw to turn ——————————————-
$10,000
If you want to practically raise your rates understanding basic supply/demand is far more useful.
The best advice I ever got was “think of the highest number you can say with a straight face, then say that number.”