Remember the cigar boxes I didn't want to part with? I flipped them on the side and made shelves within a shelf. I've got shipping supplies, scrap paper, and glass marbles stored there. My reams of decorative paper are to the right. All of my craft books are alphabetically organized on the shelves below. The top shelves are still a work in progress.
This idea popped in my mind as a cheap way to organize some of my tools and supplies.
And since my space doesn't include a door, I picked up some hooks too.