Start light, perfect form, work up in weight very slowly.
I too have a bad back and deadlifts (and squats) have given me my life back.
I also find that Romanian and Stiff-legged varieties are much easier on my back because I can keep strict form in the bottom position. Most all of my re-injuries have been from pulling off the floor.
Last edited by Off Road; 07-19-2012 at 10:20 AM.