With its adjustable shelves, the IKEA Mandal headboard is already fairly adaptable, but have you thought of using it in ways other than a headboard? These folks did; perhaps it will inspire you to look at the Mandal with new eyes of possibility.
DIY wooden coat rack from a branch You end up with more professional and consistent results. The simplest shape for a novice is a rectangular or square one. Obviously, you've to remember to consider exactly what sort you're acquiring.