And I thought I was the only person who takes picture of our check luggage Lol
I do it right before I give it to a porter. I also make sure I have a copy of our plans inside the luggage and I use two luggage tags (ours) and I also put on two of NCL luggage tags on each bag. Maybe its overkill but knock on wood haven't had an issue yet.
Cross pack and make sure any meds you take, electronics, camera etc.... stay with you in a carry on and or backpack. Yes I'm one of those people you see rolling there carry on onto the ship