Shelf brackets designed to support clothes hanger rods arent just for closets. The rod-holding hook on these brackets comes in handy in the garage and workshop too. You can bend the hook to suit long tools or cords. Closet brackets cost about $3 each at home centers and hardware stores.
DIY Mini Closet without the Closet. For people who don’t have enough closet space or have no closets this is a really good idea (could you use PVC pipe which is cheaper, or would it fall over?). Tutorial at Split the Lark here.