That's very interesting.. about staying hydrated. I can think of some times when I have starved myself or not cosumed enough liquids, while also noticing some incidental back pain. That is some good information to know.
I myself had back surgery 3 years ago due to a cracked vertibrate sustained from a football injury. I have found that the ONLY real way to eliminate back pain is to go to the gym and strengthen my entire core. Various excercies that work my lower back, obliques, and abs are essential. I then continue to do a full upper or lower body workout, which in itself provides more of a workout for your core. It is important to have proper posture WHILE doing any excersies and to properly utilize your core muscles. The way I look at it, if I don't go to the gym, my back will again become sore within a few weeks, so its a GREAT incentive to keep me going back 3 times a week.
In any serious motion that your body does, whether lifting a heavy weight, preparing for a hit(hockey or football), your core muscles 'fire' and hold your core for the most part in one place. An example my personal trainer gave me is like a pop can... where before the can is open, the pressure of the liquid and gas keeps the whole thing very rigid (this compares to your core muscles firing and keeping your core solid.) If the pressure is lost (as if your muscles are weak or give out) the rigidity is lost and there is no support, therefore putting pressure on your spine and back. It is vital to keep this muscles strong and make sure that they don't go unused from day to day.
Something that goes hand in hand with going to the gym and strengthening muscles is STRETCHING. Not only the muscles in your back, but your legs as well. Your muscles are connected in a 'chain' all the way from your ankles to the back of your head. Some people with back problems may feel this, as for example you bend your neck forward to your chest and you can feel something pulling on your lower back. It works the same way with your legs. You must stretch often to make sure that not even ONE muscle in this 'chain' is tight or the rest of the connected muscles will have to compensate. This problem is common as most of us sit in an office chair all day. This commonly causes some muscles to become tight and make others overcompensate, really wrecking our posture and causing problems. This all sounds like a lot, but simple lower back and leg stretches will really help. Look up a set of streches for people with back problems.
Like a lot of us, we have these conditions or issues that we simply have to live with for the rest of our lives. I figure that instead of complaining about it I just deal with it and look for the best possible option to make things better.
Thanks for all the input, I hope mine helped.
Mark