I've been using the sports gel shoe inserts found at the local store. I believe it is made by Dr. Scholls. Nothing special, but the inserts work well for me.
What I've been doing after tennis play to heal my feet is to walk barefoot when possible. Doing so I think is easier on my feet.
As strange as it sounds there is even the idea that barefoot walking or connecting to the earth has an anti-inflammatory effect. Doing that has helped as well for me, as after 30 minutes plus of barefoot grounding outside or on a grounding pad indoors a good portion of the pain is gone.
Some information I've seen on the benefits of barefoot walking.
"Summertime Barefoot Cure"