As I am slowly coming off of the pain meds, I find I can concentrate on an entire movie without drifting off. I tivo'd a whole mess of them for my recovery and am starting to go through them. The first was "The Adventures of Buckaroo Banzai: Across the 8th Dimension." I had not seen it since the 80's, so it was new and fun.
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.