You don't have to feel chipper to smile-just will your face muscles to move heavenward. You'll look more attractive and when your feelings catch up with your cheerful decision you'll feel better, too.
Smiles are contagious, irresistible, and just downright friendly.
Of course, picking cheerful melodies is preferable lest we add to the sack of sorrow we sometimes drag around. Today is the day to fill the air with joyful sounds. Perhaps you could send them a cheery card, a photograph you know would please them and bring back fond memories, or why not bake your favorite dessert and drop it off at your minister's home. Sharing blesses everyone. It takes out mind off ourselves and reminds us that the world is bigger than we are.