Thousands of pieces of luggage come onboard at roughly the same time. Don't panic if your luggage isn't in your cabin when you arrive. It may take a few hours to get to your room.  Marking your luggage with a unique ribbon on the handle has become commonplace, but it can still help you locate your checked baggage both before and after your trip.  Consider taking a light change of clothing in your carry-on just in case.

Two-way walkie-talkies are a great way for family members to keep in touch while onboard the ship. If you don't have your own, many ships rent them for the duration of the voyage.

Plan to spend an average of $10 USD to $15 USD per day for gratuities.  You can also have these pre-paid so you don’t have the worry at the end of your cruise.

Double-check that bill. Many lines add a 15% gratuity automatically to bar, beverage, wine and deck service tabs.

It's never wise to leave valuables out in the open in your cabin. Lock them in your luggage or use the safe in your cabin (if available.  If not, see if the ship has a general safe for passengers.)

Many ships sell an "unlimited soft drink" cup for kids. If you're traveling with young ones, this can be a wise investment and save you some significant cash.

Many cruise lines offer in-cabin babysitting. Take advantage of this service.

Learn the exit route from your cabin to the open decks, in case of emergency.

Sign up for spa services, sporting events, salon appointments and other activities as early as possible.  These items can sell out very quickly.

If you have any issues with your cabin, report them immediately.

At first, you may wish to carry the deck plan with you. Take a walk and familiarize yourself with the layout of the ship, and learn how to reach your cabin from the main stairways.

Items that are not included in your cruise fare typically include: alcoholic beverages, soft drinks, laundry, phone calls, casino gaming and specialty dining.