By "shoe fixers," I mean insoles, heel grips, ball-of-foot cushions, etc. -- anything that helps a shoe work for your foot. I'm wondering what specific items and brands you have had success with, and what problems they addressed.

I recently bought a pair of shoes that turned out to be EXTREMELY slippery on the bottom. Literally, I could not move forward on my hardwood floors due to the lack of traction.

I fixed that with something called Shur-Grips, that I cut up and applied all over the sole. So far, they haven't come off and have completely solved the problem.

What shoe fixers have you had success with?