I mentioned that A Scanner Darkly was being made in a film a while back. Now there is a cool little update from PKD's daughters.
"June 12, 2004 - As many of you have already heard, A Scanner Darkly is being adapted for film, and we are happy to finally share details about it. This project is very exciting for us -- not only because of the caliber of talent behind it, but because we believe that it will be the very first faithful adaptation of a Philip K. Dick story. Directed by Richard Linklater from his own screenplay, A Scanner Darkly stars Keanu Reeves, Winona Ryder, Robert Downey Jr., Woody Harrelson and Rory Cochrane."
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.