Put the jewellery on is the last thing before going out, and take off jewellery when coming back home.
Do not use water to clean the piece. Try a dry cotton ball or soft cloth.
Please avoid any moisture (sweat, swim, shower...) or chemical (lotion, perfume...) because these may strip away the gold finish.
Store each piece separately in the pouch or a sealed bag to prevent the metals from tarnishing or interact with one another.
Remember, sleep with jewellery is not recommended.