Robot Johnny has a very personal piece about Nick Lowe that is worth a read.
While I am not quite at "man crush" level with Nick Lowe, I have always thought that the best pop song ever is "Cruel to Be Kind," and I enjoyed the one that he links to as well. Additionally, I was not aware that RobotJohnny is also the editor of Drawn, which I read daily. I only knew of him as a fellow poster on Metafilter.
It got me to thinking about how I have a similar "relationship" with Richard Thompson. He has two songs from the "Rumor and Sigh" CD, "I Misunderstood" and "I Feel So Good" (Full Videos for both at Capitol Records) that get close to firing the same synapses as "Cruel to the Kind". I have already posted about his cover of "Oops, I did it again," further showing his pop sensibility.
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.