Here is a simple way to display earrings for a show or at home. Use a staple gun to attach a piece of screening to the open section of a frame. Then just hook your earrings through the openings of the screen. Plain or fancy frames, whichever you prefer, they both look great!
I make many pairs of pierced earrings with earwires rather than posts. It is easy to turn a mesh wastepaper basket upside down and hang the earrings around the basket. For display, put the basket on a turntable or Lazy Susan and you can fill the inside with colored cellophane and secure a mirror to the top (which is now the bottom since you flipped it over!).
The cords of different colors that are made of rubber, to put on memory wire, can be used as earring backings. You simply cut a pair of small pieces, and you have instant backings! The whole in the tubing is just the right size for the size of earring wires.
Magnetic clasps on bracelets--I've found that when your clasp comes into contact with metal, i.e. shopping carts, etc. that it will come off and stick to the item and you don't feel it come off. I solved the problem by attaching a two-inch safety chain with a jumpring on each end and attaching the jumprings to the two jumprings on the clasp. The bracelet won't come off of your wrist.
If you like to make your own wire earring hoops, a cheap and sturdy mandrel can be made from the white connectors used for PVC. They come with outside dimensions from 1.25 to 2.75 inches making them perfect earring hoop sizes.