While searching for exercises which could be done at home to keep the body fit and also add some muscle, I encountered this video Super Pull Up Workout. The exercise seemed simple to do in a home environment. I got myself a Pull-up bar and attached it to my bedroom door.

Now as much as I know my body I can trace this back to two reasons only:
Strength: Back muscles, specifically the lower back ones, are hard to train and are often ignored. These pull-ups added strength to my back muscles and hence could be reason why my back pain felt reduced.
Stretch: We all know how slipped-disc occurs. The gel which is present in your disc moves out, as the outer wall ruptures, and hence affects the position of your spinal bones. Now, while i was doing my pull-ups, or sometimes just hanging from the bar, i realized that this activity is stretching my spine. I would not like to say that because it stretches the area between two spinal bones it is lending a hand to let the gel based liquid get back in line. But I am sure gravity acts in a way to help the gel get back into the default position. Or may be it is just a little flexibility it gives to the back in a way normal body stretching exercises give to other body parts.
Bottom line: For me they have really helped me deal with my back pain and i hope that they help you too.
-Out