With the Mileathon the more activities that you do, the more miles you get! Normally this is a targeted promo, but it currently has open registration!
-Enroll in the OnePass frequent flyer program
-Purchase an Economy Class round-trip ticket
-Book online at continental.com
-Check in online at continental.com
-Acquire a Continental Airlines Credit Card
All activities between 09/01-12/31 count for credits and at the end of the period you can trade the credits for the corresponding number of miles.