I was going to post some really trippy videos of Tangerine Dream performing "Ricochet" live. This was when electronic music needed banks of equipment (and, apparently, 100's of candles.) Then I was going to post a link to "Love on a Real Train" from the Risky Business soundtrack as a way of saying "You've heard these guys before."
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.