S.H.
Sorry if these are repeats - I didn't have a chance to read the other responses:
gift certificate to the movies or Fandango.com
gift certificate to a mall (she can choose where to spend)
gift certificate for admission(s) to a museum or look into a museum membership (there are some memberships that cover multiple museums)
gift certificate to a book store
gift certificate to a sports store
gift certificate for Amazon.com (she can buy darn near anything!)
and last but not least, plain old CASH in a card - the gift that fits everyone! :)