Losman's Lair of Horror has reviews for every horror movie ever made. Not just the Frankenstein or Scream variety, but the really sick shit. Videodrome, Henry: Portrait of a Serial Killer, Begotten, Welcome to the Dollhouse and my least favorite movie of all time, Doom Generation.
I am going to have nightmares just thinking about some of what I read there.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.