I agree with the previous post. Either earn another 2,000 miles and reach 20,000 and get a free off-peak domestic free ticket or kiss them goodbye. Switch to MCI and you'll get at least 2,000 miles but don't procrastinate as it takes 6 to 8 weeks to have the miles post to your account.

Also, if you visit The Airline Mileage Workshop, there are other freebie ways to earn NW mileage. That URL is: http://members.theglobe.com/mileage