I herniated a lumbar disc about 6 years ago. It took about 18 months to return to 95% functionality. Prolonged sitting, and squatting aggravated, but Ibuprofen knocked it back down. I did 3-4 PT appointments back then, but the exercises seem to aggravate more than help.
I reinjured the same disc about 3 months ago, and I'm deeply embroiled in PT, MRI's, and visiting surgeons. The referral process is very slow, which has given me some time to recover. It's also given me a lot of time to read studies on surgical outcomes, and try different manual approaches. My suggestion is to read as much as possible, and test things out of yourself.
Stuff I Have Tried
1. Waiting. Didn't work. ;)
2. Taking a 12 day course of Prednisone. Corticosteroids are like NASID's on, um, steroids. It knocked down the inflamation, which reduced pressure on the spinal nerve, which reduced pain and allowed healing. That's the theory, at least. I kinda worked.
3. Started PT, after Prednisone didn't fully resolve the issue. I'm sticking with this, 8 weeks later
4. Started accupuncture. I'd never had accupuncture before, and it took 4 sessions before I could really relax enough for it to work. Results were ambitious, with only 1 of 4 sessions reducing pain. It was $100 a session, so I quit after those first 4.
5. Borrowed an inversion table from a friend, and tried it during the same time period. It made me hurt more, so I abandoned it.
6. Started taking 600mg ibuprofen in 12 hour increments (i.e. 1200mg per day).
7. I stopped sitting. Not kidding. I either stand, or lie down. Any sitting is timed, and must end after 15 minutes. If I do have to sit, I use a lidocane patch. Apply 1-2 hours before the activity, because the gel takes a while to sink into the joint area. Or it takes the placebo effect a few hours to sink in. I'm on the fence here, but don't question too deeply, because it doesn't matter how it works, just that it works.
8. I stopped beinding into forward flexion. If I drop something, I do a lunge to pick it up. Sometimes I squat, but my achilies are too tight, and my lower back rounds at the lower end of the movement. The opposite of what I want.
9. I walk a minimum of 2.5 miles everyday. I was encouraged to continue, despite pain.
10. Three months of rarely flexing forward has tightened my already poor flexibility, so I'm slowly adding some stretches that don't floss the sciatic nerve.
There are other avenues to look into, that I haven't tried yet. Surgery, of course. Also chiropractors, decompression tables, and lots of books about foundational strength, pilates. All these treatment methods have rave reviews, and people that say it crippled them. Unfortunately, back pain is highly individualistic.
Final advice, read up on your transverse abdominis, pelvic floor, and multifidus muscles. Current theory is that back injury and pain are usually related to poor tone or control in these bad boys.