Keep your jewelry away from water. Do not leave it next to a heater, window, in the path of air-conditioning or in the bathroom. Remove before bathing.
Avoid sweat: remove all jewelry before exercising or other physical work as sweat causes the jewelry to tarnish.
NO BEAUTY PRODUCTS
Stay away from cosmetics: make sure you apply perfume and make-up prior to your jewelry as these will tarnish the metal.
Storing jewelry in original pouches or boxes is the best way to keep it protected. As well as using jewelry boxes with enough space for each piece separate.