Free Printable button to print out on a sheet of paper, trim with scissors and pin on when you go CHRISTMAS shopping. If they don't serve you well, put the stuff back on the shelf (don't abandon carts, that's not an example of RIGHTEOUS indigation) and tell them why.
KEEP YOUR RECEIPTS because the Culture War isn't over...and most stores allow cash refunds after Christmas with receipts. Most only allow exchanges (no cash) without the receipt. Beware the fine print of some nonrefundable 'gift certificates' though!
No need to rush to pagan purveyors tomorrow--that is their idea, not yours. Consider what gifts you could give that are bought not with cash but instead with time and love.
Other ideas and resources at the site below although the site hasn't been updated recently.
Please Wish Me A Merry Christmas!