Set it aside for a later day and time, they might be useful
Once I was designing buttons but I forgot to punch holes in them. It was too late when I realized it, so I set them aside, disappointed.
Weeks later I picked them up again and thought they'd be the perfect size for earrings, and now they're a big hit!
or you can repurpose them into wash cloths or something useful for your home
You never know, maybe one day you'll make something new and this not quite right piece will be more than perfect for it and you'll have a new line of products!