Grab your large suitcase and put in your undergarments first. Make sure you have enough for 11 days. Don't forgot the socks.
Pack at least one pair of comfortable sneakers and one pair of dress shoes for cruise formals. Depending upon the weather, plan on bringing a waterproof coat, gloves and a scarf.
Choose a couple pair of sweats or nightgowns to sleep in and pack those.
Pack your pants and jeans next. Remember, you will need enough for 11 days if you do not plan to wear the same pair twice. Depending upon the weather, you may not need to pack shorts. Pack at least one pair of dress pants.
Decide what shirts and blouses you would like to bring with you. Pack enough to last the duration of your cruise and to coordinate with the pants you are bringing. Pack a sweatshirt or sweater for cold nights and mornings.
Pack your identification, credit cards, money and any trip itinerary you may have.
Place your toothbrush and any toiletries you may need with you on your cruise. Do some research ahead of time as some cruise lines may provide shampoo and soap on the ship.
Pack your sunscreen, insect repellent and sunglasses.