Use zippered pencil pouches to organize puzzles instead of storing the bulky boxes. Cut off the image from the front of the box and store it in the bag, too. (This blog post has several great ideas for organizing kids toys.)
Label your folders with washi tape. Unlike traditional sticker labels, washi tape peels off without tearing, so folders can be used and reused. It also comes in dozens of hues for a satisfying number of color-coding possibilities.
Learn how to make the easiest wedding seating chart ever!