As advertising creatives who were spending more time talking stationery than actually making ads, Jen and Lisa decided it might be time to reevaluate their careers. And after three moves and a coupla ancient printing presses (named Bill and Helga), they don't regret a thing. Expertly weaving together snark and sentiment, the duo cranks out colorful, letterpressed cards that are actually fun. The secret to their creativity? It's written on a 1-inch square piece of paper, locked up in a vault in the Netherlands. "Good luck finding it," they quip.