What to have in tack box.... storage compartments?

Not tack but different storage compartments. So far I have shelves, bridle and halter hooks, saddle stands (2 english and 1 western), poles for hanging things, drawers.
Anything else???

Possibly a place for grooming, emergency first aid stuff (Gauze, Wraps, and other medical supplies). Also a place for chaps a helmet and saddle pads maybe human and horse boots. Hope this helped!