I'm no expert - this will be our first cruise! But I've been compiling a list based on recommendations here. It'll probably need to be pared back considerably but this is what I have on my list at the moment...
In the carryon:
Paperwork (passport/birth certificate, extra copy of b/c, agen info/conf. #s, list of Credit Cardss & contacts in case of theft); my door magnets, Addresses for post cards, Return Address Labels for luggage tags, Envelope: $30 in $2 bills for room service (other misc cash will be carried by dh), the kids' autograph ooks, pens for autographs, highlighter & pen for me, water bottle(s); Medicines (Prescriptions, Benadryl, Kids Pepto, Gaviscon, Tylenol and/or Advil, Dramamine/Sea Bands, Bandaids, Neosporin, Bactine); Sunglasses; jewelry; camera(s) - cards & batteries; sunscreen; Wipes; Pillowcases & Pens (to take to guest services to be autographed)
Packed in the luggage:
lysol, wrinkle releaser, damp rid, dryer sheets, detergents - dish & woolite,
suction hooks, disposable camera(s), powerstrip, binoculars, extra water bottles, beach bag & sand toys, hair dryer?, bags for dirty clothes, extra ziplocks
I'm trying to think of everything and take all the advice I can get...I'm probably over-thinking it.