Flower or Herb: Rosemary. It is an herb of focus (http://www.bhia.org/herbal-supplements/brain-and-memory.htm).
Colors: Turquoise. This color symbolizes inner healing and the ability to love not only ourselves, but others.
Animal: Cat. This animal means mystery and independence, according to Animal Speak, by Ted Andrews. In addition, cats are able to see in the dark (http://www.sayahda.com/cyc1.html). How much darker could life be if you were constantly hounded by your own personal demons?
Stone or Gem: Amethyst. According to the Illustrated Book of Crystals, the amethyst calms the mind, enhances spiritual awareness, and relieves pain.