Even the longest dark night of the soul must eventually give way to the bright daybreak of renewed hope and inspiration. It is not that that is much comfort when you are right in the midst of a miserable mood. Even the world's least musical individuals seem to carry an imaginary violin that they can pluck from the air and then scrape out a plaintive melody, with which to accompany their tale of woe and despair. But that very same fiddle can also be used for a series of jolly reels and jigs. Choose what tune you call today.