How to use a Ballard coupon Once you’ve added everything to your shopping cart and it’s time to checkout, make sure to use a coupon. Are you shopping for full-price items? A coupon is the best way to save on outdoor furniture, seating, bedroom furniture, wall art, mirrors, and more. Go to your shopping cart and enter it in the designated box to apply your coupon. You’ll have to click “Edit” before typing it in.