I cannot think of a better time for what Jung called "the realization of the shadow" than on Halloween. This year why not dance out your shadow by picking a costume that embodies your alter-ego or part of yourself that you normally do not allow or expose? For the really courageous, act in the character of your shadow costume during a party.
So... if you cannot think of a good costume this Halloween, live a little and expand your repertoire. Let your shadow come out to play!