Get out of bed forcing a smile. You may not smile because you are cheerful; but if you will force yourself to smile you'll... be cheerful because you smile. Repeated experiments prove that when man assumes the facial expression of a given mental mood, any given mood, then that mental mood itself will follow.
January grey is here, Like a sexton by her grave; February bears the bier, March with grief doth howl and rave, And April weeps - but, O ye hours! Follow with May's fairest flowers.