Lower Back Pain Prevention

What movements would you recommend to help prevent a lower back injury from squats and deadlifts? About 5 years ago I pulled my back (lower right part of my back to be specific) during a bent over row. Fast forward a few years, pulled the same muscle performing deadlifts, fast forward to today, did it when i was coming up from a squat. Just before I squated today, I performed Marc's pillar prep like I do every day for the past few months. This was also while warming up at a weight of 225. I also don't want to become dependent on a belt.