For those of you who have, less-than-friendly Publix stores, or get nervous bringing your total close to zero, try this...
Drop in Publix sometime and get a $25 gift card.
Then, the next shopping trip you make, add another $25 gift card to your purchase. Have the cashier ring it first and then your other items.
Let's pretend that after all your items and overage, your total is $.52 (not including the gift card). If you purchase a gift card, your total is actually $25.52, but when you use the FIRST gift card to pay for $25, making your total $.52. Then you have your new $25 gift card for your next purchase, there won't be any nervousness on the part of the cashier, since your total was $25+ and not under a dollar.
You can keep rolling them like this as long as you like.
For those who like to think that us couponers are "getting something for free" "practically stealing" "probably doing something illegal" etc, this makes them think you're spending more than you really are and will help keep you in good graces.
This also helps prevent the need for manager override since the coupon amount won't go into the tax.