Jan. 1 is the day that many people make resolutions and goals for the new year. And this year thousands of would-be marathoners have put the Air Force’s annual marathon on their list of things they’d like to accomplish. Marathon organizers have often offered an earlybird discount for runners eager to register and this year was no different. Those marathon and half marathon runners who registered by Jan. 1 saved $10 off their registration fee and those looking to run the 10K and 5K  saved $5. The Air Force Marathon filled a third of its 15,000 runner slots with more…