Nothing in life is as reliably mood-lifting as a gorgeous bunch of flowers (okay, maybe chocolate). The style equivalent: a softly blooming cotton button-down shirt (J.Crew, $88). Under a business suit, it gives a whole different tenor to your day (it's equally compatible with jeans, shorts, or khakis). The clean tailoring is a great balance for the misty watercolor print and fanciful necklaces. Short chain with flower motif, Miriam Haskell; long, Simply Vera Vera Wang.