My bathroom is by far the smallest room in my home, but as the only bathroom in a multi-roommate household, it has a big job to do — and a lot of stuff to contain. I have an over-the-toilet shelf, under-sink drawers, and a coupleof towel hooks on the door, but it still gets cluttered in there.One effective way to add more storage to a tight space is by utilizing your walls, like with this clever wall-mounted towel rack full of shelves, hooks, and other surprises.