That was the kind of half the Rams were built for.
Work the ground game and Tavon Austin. Run the short offense to open up the seam and sidelines. Play strong defense and contain the passing game to the middle of the field.
There were some issues. The offense looked really incapable for a stretch as QB Austin Davis struggled to deal with pressure, as his primary reads weren't open and OC Brian Schottenheimer wasn't scheming for the pressure. That changed on the TD drive though as he had multiple releases that softened up the linebackers just long enough to hit Jared Cook streaking through the seam for a huge TD.
Defensively, it's the same blueprint for the Cardinals. Bring pressure. Cover deep and on the sides. Force Palmer to work the middle. When he does, close it down. It's worked well enough over the years, and it's working today.
Now, it's just a matter of replicating those 30 minutes to get the win.