I am also a victim of back problems. But mine are probably more long term (1 herniated disc, 1 bulging) and are still with me since January. I found an awesome thread while searching for the info that your looking for now:
I've been going to physical therapy since March and they really stress stretching as being just as important as strengthening the back. So I'd say try and stretch 3 times a day while your injured. I do the following:
Double Knee to chest:
The Cobra(like a pushup but keep pelvis on ground):
Hamstring Stretch: (3rd picture position works best for me)
You'll need to make sure you get more flexibility in your hips and hamstrings to reduce pressure of your back in your daily activities. If you lay on your back and bring only one leg straight up, you should be able to get a 90 degree angle betweent the lifted leg and the ground. If not, keep stretching your hamstrings until you can achieve this.