Flipflops might not be at all good. Specially if they are old and worn out. Plus they do not have laces at all. Why not just use socks?
I read about the insert in a danish article (I am from Denmark). Basically I use the heel part of an normal insole I had lying around. Then cut out 1/4 of it, the front, outside 1/4, to reduce stress/press here under the foot. Then it looks sort of like an J (depending on whether it is right or left shoe). It seemed to fit in the way that this was where I was most sore. Might not work for everybody.
Wilson PS Classic, Gosen OG Micro 16, 26 kg.
Last edited by Povl Carstensen; 12-18-2012 at 01:55 AM.