Have you just gotten them?
Sure you can keep them for next year - after all there will be a halloween!
Or...make some snowball decorations....
To make this I smooshed versamark all over the black side of the web doilies and then heat embossed with white embossing powder. I then folded 10 in half and glued them together in the middle, running some 1/8" ribon up the middle too.
I then sprayed with spray adhesive and dumped the 'ball' in glitter...so it really is VERY sparkly!
Then I added a Silver ribbon bow and some silver cording trim