Look around the store.... for a box like machine.. typically with a sign above it .. check price here or something like that... if you scan your card you get coupons.. I have seem them attached to the support pillars in the middle of the aisles.. up at the fronts of stores, etc.. there is no one set spot..

Post what store you shop at though and maybe someone can help you out....

May want to start a new thread with the question though so people actually see it and answer.