I'll give the ball massage a try. Dang. That sounds slightly obscene.

Moving right along.....another thing the foot Dr told us about that is pretty cool (literally). Take a plastic water bottle, fill it with half water and half rubbing alcohol. Stick it in the freezer. After a walk, use it to massage the bottoms of your feet. He also recommended that we mark the bottle with warnings -- wouldn't want to accidently drink it. Although I suppose if you replace the rubbing alcohol with vodka.........

I haven't tried double socks, although I do have liners and socks from my hiking days. The Wright sox are pretty cool, they're double sox on their own. So far I've had good luck, no blisters. *fingers crossed*