the only shoes that can and will help you without custom inserts are running shoes. they are the only shoes made that with different categories to help out different mechanics and gaits. and even then you will have to go to a running specialty store to be fit properly. dont worry, it costs no more than a department stopre full of derps.
for all other shoes, find a good foot doctor and get orthotics made.
as for the plantar fasciitis. be prepared to spend months recovering and the likely chance it will come back several times. i used to work at a running specialty store and we would deal with it nearly every day. very common injury and very time consuming to get over. there is no one thing to help, it is consistency with several things.
stretch the calfs as much as possible. as in several times a day. especially when first getting out of bed. there are socks you can get that can pull the feet up that helps.
massage, massage, massage and use a golf ball. it will hurt and when you are done it will feel better.
you can ice to keep down the pain, but i would recommend only using to keep down the pain and not to spee dup recovery. keep it mobile as well throughout the day. the more you sit still and let things tighten up the more it hurts. when you wake up and the pain is diminishing then you are getting over it.
there are other things you can do and there plenty of websites with great articles. i would go to runners world first.
