Do pack with you comfortable shoes and clothing. Casual wear is popular in Hawaii. Do wear your sunglasses when outdoors. Do bring your camera with you, and take lots and lots of pictures. Do wear a lei when you can.
Every day is lei day in Hawaii.
Do wear your seatbelt at all times. It is the law here. Do wear glasses or goggles when driving your moped, or you may get a ticket. Do make right hand turns unless the sign says otherwise. Do cross the street on green or when the walking man signal is on.