You will need:
1/2 cup of rock salt
1/2 cup of coconut oil
1/2 cup of white rice
2 handfuls of gardenia petals (or similar white flower)
5 drops of ylang ylang oil

The above should be mixed together during a new moon and stored in a dark cool place until the wedding night. On this night bathe with your partner in a bath into which the above salts have been dispersed. This will ensure good luck and a happy start to your marriage.

Note: Another idea for a happy marriage is to not only exchange rings on the day, but exchange lockets with a photo and a lock of each other's hair enclosed. Cut the hair as you both think about your love and desire for a happy marriage and the hair will hold your intent and always work as a charm for your marriage.