Worn wedges?
Slanted soles?
Catawampus kicks?

thesolution is Heel Seals: adhesive sole savers

Most people wear down the outer edge of shoe soles/heels. But who wants to surrender a favorite pair of shoes and a pile of money to the cobbler to worn heels? Now there's a new cobbler in town: YOU. Simply keep a pack of Heel Seals, adhesive sole savers on hand. When you get a new pair of shoes, peel off a nonskid, nonmarking Heel Seal and stick it to the place you wear most. For shoes you have already loved a bit, clean the heel with alcohol and stick a Heel Seal over the worn heels. (Let cure overnight for best adhesion.) Replace your Heel Seals every 20 or so miles. And don't worry, we didn't club any seals to make these.

Made in the USA. Non-marking black.14 seals (what a deal!)