WorldPerks has introduced its first big promotion of the year — Mileage Maximizer. Like so many Northwest promotions, this one is geared to encourage partner activity — in this case, hotel partners.

Stay with WorldPerks hotel partners between Feb. 15 and May 15, and when you ask for WorldPerks miles at check-in, Northwest Airlines will maximize your mileage-earning potential by awarding bonus miles beginning with your second hotel stay.

These miles are in addition to the standard miles, and any promotional bonus miles you earn from the hotel itself.

To take advantage of the promotion, register online at http://www.nwa.com/offers/maximizer and enter registration code 8483 before your first stay.