I have a couple of friends who are chiropodists and although they don't know what to tell me about most of my body, they have provided tons of info about feet because I suffer badly in my left foot. My right experiences some pain, but to a different degree and I think it's probably from overcompensating.
The one thing I have found helpful for weeks at a time also happens to cause the most excruciating pain whilst doing the exercise, but I do it because the benefits outweigh the constant pain. It's a simple thing, just make sure you've got something to help keep you steady as you go because it is not fun. Grab your broom, lay it down on the floor and ever so slowly, inch across it from the tip of your toes down to the back of your foot. Do this 2/3 times a day (can be done at the same time of day) and over a period of days until you feel relief.
I have orthotics, but a good quality shoe is important. Pick them up and if you can bend them or twist them, they aren't going to support your feet properly. Move on. A lot of the orthopedic shoes aren't super attractive or trendy, but there are other brands I have heard them (and others) float over the years (New Balance, Asics, Merrell). We once saw a chiropodist in another country and they refused to do any treatment whatsoever until we purchased Merrell's and had been wearing them for 6 mos. I currently own asics.