When I remove an icon to make way for a new one, I put the old one here, which is a repository of every icon I've ever used in the past.
Sometimes I get the urge to make an icon, thinking I might want to use it someday, or somebody else might like to use it, or purely as a design experiment, or even a joke. :} Those go here.
And remembah, theah's no more important icon-making rule than ta weah these:
Safety glasses.