Here is a checklist of items to pack for your honeymoon:

Carry-On Luggage Essentials:
Airline tickets
Reservation information (hotel, rental car, etc)
Travel itinerary
Passport
Traveler's checks
Emergency phone numbers
Medication
Underwear, nightwear, and one change of clothing (in case luggage is lost)
Wallet/purse
Medication
Hand wipes
Kleenex
Keys for luggage, car, and house

Clothing:
Underwear
Shoes
Socks/nylons
Shirts/blouses
Jeans/pants/sweatpants
Sweaters/sweatshirts
Swimwear
Suits/ties or dresses/scarves
Belts
Jewelry
Coat/jacket
Hat
Nightwear (optional)

Toiletries:
Makeup
Shampoo and conditioner
Razors and shaving cream
Lotion
Brush/comb
Toothpaste/toothbrush/floss
Manicure set (nail file, nail clipper)
Soap
Deodorant
Over-the-counter medication (aspirin, etc.)
Contacts and contact solution
Sunblock
After sun lotion
Insect repellent
Feminine hygiene products
Hair dryer
Curling iron

Miscellaneous:
Camera and film/batteries
Eye glasses and repair kit
Sun glasses
Alarm clock
Snack food
Binoculars
First aid kit
Maps
Magazines/books