For the basement stairs: cabinets, stairs with flip up steps and very narrow stairs. Each step goes up one at a time for each foot. It is sort of spaced so you are putting one foot per step with a steeper step. Very space-saving.
Kitchen or anywhere DIY. Seems simple enough, depending on your gap between shelves, anywhere from ropes to ropes for your spacing. You could even use wider wood, just adjust your rope length to accommodate your width and height of your shelves.
IKEA - NORDRANA, Hanging storage, grey , The hanging storage unit is handmade and therefore unique.Hangs over the top edge of the door and helps you convert unused space into a storage place for bathrobes and bags.