I find every once in a while I like a smaller pillow filled with something like wheat or barley. Something like those magic bag microwavable bean bags I on occasion use when my neck gets stiff with other pillows.
https://www.amazon.ca/Magic-Bag-Exte...7621509&sr=8-6
Bonus is that I can warm it up and fall asleep to a warm "pillow" every once in a while.