If you have a long, winding driveway, it can be pretty difficult (and dangerous) for you and others to drive through it at night. To make it safer, nail a few old CDs to posts or trees as light reflectors.
Whether you have CDs that are beyond saving or just no longer necessary, you can post a few of them up as light reflectors to help you and your guests navigate your driveway. Hit the link to read up on 44 more great uses for old and broken CDs, and share your own favourite uses in the comments.
44 Fanciful Uses for Dud Discs [Instructables]