When preparing for a cruise, there are a couple of advanced purchasing options that travelers have including ticketing, accommodations (drink tickets, suite size, etc.), and shore excursions.

It may be tempting to pre-purchase shore excursions, but there's no need to be hasty. Shore excursions are fun, desirable, and an important component in the cruiser's experience. However, unforeseen circumstances can arise during a cruise (a late night, for instance, or horrid weather), and once purchased, these tickets can be difficult to refund or exchange.

In many cases, excursions can be purchased on board, so waiting until you're aboard can potentially save time and money.

Related: Research, and get off the beaten (excursion) path - Cruise tip