The last two years, Disney has done promotions where you are able to get into the parks free for a day. If you take advantage of that, you have been able to put that amount (currently $72 I believe) towards your AP.
In 2009, you got in free (or a gift card, or Fastpasses) for your birthday.
For 2010, if you volunteered with the right organizations in the right time period in the right way, you got in free (or Fastpasses, or some pins) on a day of your choosing, with a few days blocked out.
So IF they do something like that for 2011, you could do that, which equates to a $72 discount on your AP. Of course, I don't know that they WILL, but that's been a "discount" that has been going around for quite some time.