Are your e-docs ready on the MSC website? Your e-ticket should have a luggage tag in it that you will have to print out. Of course, you can also just wait until the pier and have the porters put tags on. Many have just started doing it that way instead of printing tags.
Jimbo ... As Dave says you should get the documents vial E mail and will include the Labels, they are already filled in with name and cabin number etc, we just print them out and laminate them or you could use clear tape on them which also stops them getting wet outside.
I love the smell of Jet fuel in the mornings!