If you listen to NPR, you have no doubt heard the strange voiced man tell his tales of working as an elf at Santaland, of cleaning apartments in New York City and the torture of growing up as a misunderstood musical prodigy. All of his books are available in a 14 cd box set. I can't read more than a paragraph without pausing to laugh my ass off. I have just ordered mine and I can't wait to hit the review button on my CD player to listen to the bits I missed while chortling with glee.
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.