First of all, I want to thank Skippy for sending over 80 new folks to this page. If you have a few hours a day to spare, you will enjoy reading all of the great articles on his site. He posts a lot and it's all good.
Second, I needed to let you know that this game now ownz me.
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.