Disneyholic, I'm not fantastically organise so not sure I can give you any extra info than the obvious! But here's my packing list (from what I can remember - visualising our luggage!)
Hand Luggage:
Folder with flight tickets, theme park tickets, passports, coupons and reservations, dollars along with our day-by-day schedule
Zip-lock (see-through) bag with make-up (for use through airport security)
Entertainment materials (books, DS etc.)
Headphones (since I don't like the freebie ones; hurt my ears after a while)
Sweets (mainly for landing - sometimes gives me an awful migraine, so chewing something really helps)
Sunglasses (since it'll be bright on arrival)
Main Luggage:
Clothes (underwear, mix of casual tops, shorts and skirts with a couple of dresses for evenings, plus bikini)
Footwear (flip flops, prettier sandals for evenings, going to wear trainers on the flight)
Suncream and aftersun
Shampoo, toothpaste, conditioner, make-up remover all in a ziplock bag (incase anything spills)
Toothbrushes, soap, other non-liquid toiletries in a drawstring shower bag
Folder with copies of hand luggage documents
Water fan (for queues in theme parks)
Cap and hat
Beach towels
Jewellery (in a separate compartment)
Hair brush & bands
Mobile phone (for our return - just incase emergency at the airport)
Extra entertainment for return trip
Space padded out with plastic bags (to save room for buying things over there, padding it out stops the other bits in the case from flying around).
I always wear over there a short-sleeved top with a light zipped jacket over the top; that way I can wear the jacket on the plane (since they tend to be quite cold) but on arrival I can take it off (since it'll be very hot!)
Remember with hand luggage, you're also allowed to bring a handbag so pick a decent size one to fit any overspill in. You are also allowed to carry on a book/DS in your hand if they still aren't happy with luggage weight.
Should you need paracetamol etc. on the flight, if it's Virgin I know they can provide that. Otherwise you may want to bring some of your own.
May have missed things, but hope that's of some help!
Yay for you too nobodies!!