Print Store's Coupon Policy

I know I have touched on this before, but since it is a new year it is worth repeating.  Print out the store's you shop at coupon policy.  Familiarize yourself with it, keep it with you in case a question arises while shopping or checking out.  Also note that these policies are from the cooperate office and each store might have adjusted their policy some.  Inquire at the stores you frequent as to what their policy is.  Do they have a limit on how many total coupons you can use per transaction?  Unless noted on the coupon do not double some stores will double a coupon whose value is up to .99 before doubling.  Does your store limit the amount of doubled coupons.  Does the store allow your balance to be a negative?  If you have six coupons do you have to have six or more items or could you just have four items?  Seems like a lot of questions to consider, but you don't want to get caught off guard one day while shopping.