Shire offers a one-time coupon for 30 free Adderall. Just go to this site:
http://www.adderallxr.com/resource/adhd_coupon.asp
fill it out and bring to your pharmacist with your next prescription. If your regular script is for more than 30 capsules, be sure to ask your doc. to make you out one script for 30 (these you won't have to pay for using the coupon); another script for the remainder.
This was discussed in an earlier post: "the Adderall Card" but thought it was worth another post!