[Nerwen]

Heroine comforts depressed/injured characters by singing them a pop-song. –take a shot.

–And the story is named after said song. –take a shot.

–And there's an Author's Note about how incredibly appropriate the lyrics are. -take a shot. Make that two shots if the lyrics have no discernible relationship to Middle-earth, and three if, alternatively, the song is Enya's "May it Be".
–Update: and one more if "May it Be" is described as an ancient Elvish lulllaby.

Elrond, M.D. has to patch up the sick or injured hero/heroine. –take a shot.

Existing characters' origins are rearranged to suit the writer, e.g., Frodo is really the son of Galadriel (I've read this, honestly). –take two shots.

Hero/heroine is not just half-Elven, but the offspring of an Elf and a Maia. –take two shots.

–And said Maia is Sauron or Saruman. –take two shots.

–And the story has a suitably dramatic title, like "Child of Shadows", or "Daughter of Darkness". –take a shot.

Hero/heroine is an assassin. –take a shot. Take two if everyone treats this as a normal, socially acceptable career.

The heroine (it's always a heroine, in this case), is the Tenth Ringwraith. –take a shot. Take two shots if her sinister beauty is inexplicably visible to mortal eyes.
–No, on second thoughts, just take two shots anyway. She's always beautiful and visible.