It's not a quick fix, and it takes some work, but: physical therapy has helped me greatly. I've worked over the past couple years on really strengthening my midsection or "core" - abs, stabilizer muscles, etc - and that has helped with my lumbar pain.

Another thing that helps greatly is massage. I'm unable to afford a massage therapist every day (or even every week), so I bought a Thumper Percussive Massager, and use that to massage out my upper hips, lower back, and hamstrings at night just before bed.