Cruise ships are not required to have doctors or medical facilities. That being said, there is usually a first aid station and a physician or nurse onboard. The ship's gift shop usually stocks some basic over the counter medication but you'll pay for the convenience. You can also purchase things at your ports of call but dealing with this hassle can take away from enjoying your trip.

First off, make a list of the things that you usually forget. After you're done packing consult your list to make sure you haven't forgotten anything.

Be prepared for the sun. The sun can be the most deceiving in cool weather destinations or when it is overcast. While returning with a nice bronze glow can be ideal, don't be over anxious. Bring sun block and sunscreen and apply it frequently. Getting a burn early on in your vacation will limit your activities on your cruise ship tour and make for a less enjoyable holiday. Don't forget a hat, sunglasses, and lip balm as well. Again, you can (and should) buy these onboard the ship but it will be an added hassle and expense. If you're especially sensitive to the sun then consider bringing loose fitting long sleeve shirts and long pants; linen clothing is perfect for the warm weather.

Sea sickness is a problem for many and if you have a tendency to get sea sick then come prepared. Bring sea sickness pills or other alternative treatments. Remember that the center of the ship sways the least. Your first couple of hours (if not day) will be adjusting to the movement of the ship so don't plan any big activities.

Pack all of your prescription medication since filling a prescription will be a hassle, if not impossible, at sea. Make a copy of your prescriptions or a copy of the medicine bottle; if you loose your medication then replacing it will be easier. It's also a good idea to bring an over the counter medicine kit for tummy aches, headaches and allergies. If you'll be traveling to other countries, your digestive system may not be immune to the bacteria in the food and water. Your doctor can prescribe you anti-diarrhea pills to take just in case you encounter this problem.

With some travel preparation you can have a cruise ship tour that is hassle free. Protect yourself from the sun, prepare for sea sickness and remember your medicine.