Another way to save your shoes is to rotate them from one foot to the other after each wearing.

Ways to help save your pointe shoes

That won't work for every dancer—if one of your feet is significantly larger than the other, for example, it's a no-go. But if you can swing it, rotating shoes between feet will keep you from wearing the same pressure points over and over, extending the life of the pair. Jacob recommends marking each shoe with a number or symbol, so you can easily keep track of your rotations.

Source: Judy Jacob - Richmond Ballet via DanceSpirit