Yoga is something I really love and especially Bikram Yoga due to the long lasting detoxing effects on top of the greater stretch range due to the controlled heated environment. Here are some of my favorite yoga postures to practice for overall spine and joint health. Personally by practicing yoga, without the spiritualness side of it, the art has given my back as well as overall body a much greater balance. That's what health and fitness is ultimately about: balance.
Remember as I always say: It doesn't matter if you are doing 1%, 100%, or anywhere in between that for the posture as long as you are doing the absolute best of what your body can do for that day. Every day your body will allow you to do different things and as long as you are continually practicing your results will come and improvement is guaranteed.