The cookie recipe will indicate whether cookies should be removed immediately from cookie sheet to cooling rack with a metal spatula, or whether the cookies should remain on cookie sheet for a minute or two to firm up so they can be removed more easily.
Remove cookies using a metal spatula (also called a pancake turner). Using a plastic pancake turner may result in torn or broken cookies.
Cool in single layer on wire cooling rack. Cool completely before decorating or storing. You may want to post a trustworthy guard at the cookie rack to avoid the common practice of freshly baked cookie thievery.