If you have 20 inch squares you can do the easy casserole carrier. How about a case for your lap top, I pad, Nook or Kindle. Construct a thread caddy out of a pre-quilted square or a cover for your sewing machine/serger. How about one of the under the sewing machine pads with the hanging pocket edge? A case for your sunglasses for hanging in the car.
I love your little zipper case! It looks perfect for your wallet and keys to slip out to the store.