Round metallic stickers are a craft staple over at my house! I don't know what it is, but they're just so useful and add a nice shiny touch to so many projects. I use them to make polka dots on colored paper, for joining ribbon on a gift, for adding a small touch to a gift tag, and for small children who love applying stickers to just about any project!
And another tip, round stickers when topped with a smaller colored sticker are even more versatile! I made these notebooks for party favors for my daughter's birthday in school last year. A notebook together with a colorful pencil was a nice little gift for each first grader!
So next time you are out and about be sure to pick up some round stickers (even from an office supply store) to have on hand for a quick solution to many a crafting delemma! And I should mention that stickers can of course be cut in half or quarters, and I sometimes punch holes in the middle of each one while they're still on the sheet. And it just occurred to me that with a decorative punch that fits within the size of the sticker one could really make some great embellishments. Gotta go, I'm running to try that one!