Cover a heavy piece of foam tag board, or an actual board would work great, with fabric. We used hot glue and glued around the edge of the back of the board to get the fabric to stick. If we could do it over, I would have put some glue on the front so the fabric wouldn't sage from the weight of what gets put in the pockets.
Using lots of different jean pockets (or the bib off a pair of bibs) glue pockets onto pockets leaving the tops open to put in papers etc.
Glue the pockets on to the board, again leaving the tops open.
Add buttons, appliques, ribbon, lace, letters etc. and hanger on the back.