Secret Weapon: Insolia Inserts

Shoe inserts are brilliant in theory, but mostly rubbish in practice. Insolia inserts, conversely, actually work, having been ergonomically designed to shift more weight onto one's heel where more support for the foot can be had. What's more, instead of protruding or having to be cut for the appropriate fit, they virtually disappear once slipped into place, allowing for a night of dancing sans cramping, sans blisters.