Waiting for a good deal on a family cruise? Consider Norwegian Cruise Line, whose  NOW sale runs through Friday, September 18. The sale offers ballpark savings of about 20% off regular rates on three- to 29-day sailings through April 30, 2010. Sample pricing includes:

•  7-day Hawaii interisland cruise on Pride of America, roundtrip from Honolulu, starting at $799 per person (regularly $999)
• 4-day Bahamas sailing on Norwegian Sky roundtrip from Miami from $159 (regularly $199)
  
•  7-day Bermuda sailing on Norwegian Dawn roundtrip from New York from $499 (regularly $579)
  

Those are decent savings, but the best—and most family-friendly— part of this sale kicks in when you bring not only the kids but grandparents or other friends or family members.  The NOW sale offers discounts of as much as 60% for the third through eighth berths. For instance, Grandma can sail to the Bahamas for $99 (down from an already great starting rate of $129), the Caribbean from $129 (down from $319) or Europe from $299 (down from $499).

The NOW sale also chops the required deposit in half and gives you up to $250 in onboard spending credit, which can be used for shore excursions, spa treatments, fitness classes, or even gift-shop purchases or casino chips. The amount of your credit is based on the length of your cruise and cabin category. (Reality check: With an inside stateroom on an itinerary of five days or less, you might get only $15.)

Book online or call 866/234-7350 and use promo code PGNOW. The sale does not apply to one- or two-day sailings.