This organizer makes efficient use of space, and can double closet storage capacity. It may cost hundreds of dollars to buy custom-made organizers, but you can build an organizer for a 5-foot closet for the cost of a single sheet of plywood, a clothes pole, and a few feet of 1 × 3 lumber.

Single sheet of plywood yields two 11 7/8-inch-wide sides (A), two long 11 7/8-inch-wide shelves (B), and six 11 7/8-inch-square shelves.