Craft, housewares, and hardware stores often sell small, lightweight wall shelves. Wooden ones can be painted to coordinate with your display, and plain metal ones can be painted or draped with fabric or scarves. Hooks and pegs can be used to display any item that can safely hang. An expandible peg rack is great for hanging hats, belts, scarves, and larger jewelry items.
Hardware stores carry plenty of plain and fancy cup hooks in different sizes.
If you have attractive items of clothing that perhaps you don't wear much, make these into displays. You'll need a sturdy hanger such as a wooden coat hanger or a well-padded satin hanger. Determine how high you want to hang the garment on the wall, then place a large garment hook or nail in the wall. If the garment is heavy at all, make sure you put the hook or nail into a wall stud. Simply hang the garment up on the hook, making sure to arrange the garment to show it off the best.