Spruce up your fireplace with cutout bats. Make it even spookier with skeletons, webs and spray painted branches. Together you'll have an entire scene straight out of the scary movie. Get the tutorial at Lillian Hope Designs.
rat and mice silhouettes on the books
They're Watching From Below! - This spooky effect would be easy to create and it would be a great setup for a dimly lit area which is visible, but off-limits to party foot traffic.