Sometimes stretching the foot really well BEFORE the first step of the day helps. My wife and I have both gotten relief from this. For it to work, you must stretch the arch, really get it limbered up. Take at least a full minute, two or three minutes is even better. This must be done while you are still in bed. If you stand up first, before the stretches, your weight will force the plantar fascia to stretch too far while it is still stiff and shortened from the night's rest. This irritates the problem further.

Kent