Sweet treats on Celebrity: Celebrity's buffet secrets include delicious ship-made hard-serve ice cream (for free) in the buffet and made-to-order waffles with a choice of toppings. You can also order a cup of candy toppings with no ice cream if that's your treat of choice.

Cheap lunch on HAL: On Holland America, lunch is discounted to $10 at the Pinnacle Grill, and free chocolate truffles make an appearance in the Explorer's Lounge each evening.

Royal Caribbean's solid cup of joe: Royal Caribbean's Cafe Promenade offers high-quality coffee without the price tag. It's no Starbuck's, but it's a step above what you'd find at the buffet -- and it's still free.

Getting the best sea views: The North Star on Royal Caribbean's Quantum-class ships offers amazing views any time you go, but you'll get the best views on sea days. That's because the enclosed, glass capsule -- which can rise to 300 feet above sea level -- is often restricted from extending out over the side of the ship while in port. #inCruises Cruise Tips