Glad I found this thread – as a fellow sufferer, I’m always pleased to see hints and tips.
I only got one exercise from my physiotherapist, which does help a good bit, but then maybe I only have it mildly. Either using a ball, or my thumb, I’m to rub firmly across the sore part of my foot, left to right across the width (not heel to toe). After a few days of doing this, the pain stays lessened. Works better with some moisturiser too (at least, it’s less uncomfortable for the hand!)