Apartment dwellers and homeowners alike struggle with the spaces so small that it's a question of storage versus square footage. Simply adding any old side table or bookshelf could add more clutter than order! The near-invisible profile of this three-tier shelf from Convenience Concepts takes up hardly any floor space visually, though, thanks to its sleek and primarily tempered glass design. And at just over 24 inches tall, 18 inches wide, and 14 inches deep, it tucks easily next to seat—be it a cushioned lounge chair or a toilet—for the extra surface. Available at Target; $30.99.