Greeting cards are the perfect way to show your sweetheart you care or tell your neighbor to keep his dog off your lawn. Mark your territory with today's Groupon: for $10, you get $20 worth of merchandise at Banner's Hallmark. This Groupon is valid at 31 locations.

Banner's Hallmark hosts unique gifts and Hallmark greeting cards that creatively accent any holiday or special occasion. In the absence of sufficient stashes of construction paper for homemade coupon books, offspring can bestow upon hard-working patriarchs a puzzle-themed photo card personalized with an ingratiating image of the family ($3.49). Assorted gifts include décolleté-decorating jewelry, such as DaVinci beads ($6.99 each), and a library of recordable storybooks ($29.95 each). In the home-goods department, comely chalices provide sturdier drinking alternatives to sippy cups and wineskins made out of swiss cheese. Prices and selection may vary based on location.