I found these Lack shelves from Ikea in the bin room, but as I couldn't fix them to our stud partition walls, I have been keeping them ever since until I found a use for them. Hence this, my first Ikea Hack. I measured about a foot from either end of one shelf and cut off either end. This was extremely quick and easy, as they are hollow inside.
Then I sanded down the rough edges and simply glued them to either end of one shelf. I glued the other shelf to the top and voila! One shoe rack, which fits perfectly under the coat rack in our hall.