DIY shoebox shelves are a great way to recycle your cardboard while also adding attractive art to your walls. The best part of this project is that it's completely customizable. You can paint the inside and outside of the box in contrasting colors or choose one striking shade for consistency. You can even glue the lid inside the larger box to create a shelf within a shelf. When you're done, hang up your shoebox shelves to display lightweight items like succulents and tchotchkes with pride.