Always a warm and welcome gift in your mailbox, greeting cards are healthier than a greeting ganache and less flammable than a greeting grease hug. Send sincere and safe well wishes with today's Groupon: for $10, you get $20 worth of greeting cards from Greeting Card Universe's online store.

Greeting Card Universe carries colorful missives for any occasion with an eclectic assemblage of more than 470,000 pulp-printed products. Convey colorful birthday or bridal-shower messages, or select tender and timely tidings for Labor Day ($3 each). Drawing on an international network of 4,200 artists, Greeting Card Universe can also help craft entirely custom greeting cards, personalizing any parchment with messages such as "You Are the Sugar to my Bee" and "I Honestly Thought That Was My Hair Dryer." Customers who can't find a card they like or want an existing card's design modified can request a new design that will be ready for consideration in 48 hours—Eddie Murphy's favorite unit of time.