CANCER (June 21-July 22): Cancerian soprano Kirsten Flagstad was regarded as one of the great operatic singers of the 20th century. Critic Desmond Shawe-Taylor said, "No one within living memory surpassed her in sheer beauty and consistency of line and tone." She specialized in operas of German composer Richard Wagner, whose master work, "The Ring of the Nibelung," takes 15 hours to perform. Flagstad was asked to name the single most important thing she needed to perform Wagner's music with the excellence it demanded. Her answer: comfy shoes. That's good advice for your life and work, literally and metaphorically. Time to get really well grounded.