Basically, you need to learn to create an arch in the lower back, stay tight and uncomfortable, and incorporate leg drive. Getting and staying tight reduces your range of motion.
It took me about a year to get the hang of it.
My Favorite Part Of Lifting Is Having The Opportunity
Meet PR's: (May 2014) Raw Natural
Squat 475 lbs
Bench: 286 lbs
Deadlift: 501 lbs
Total: 1262 lbs
Squat: 495 lbs
Bench: 300 lbs
Deadlift: 520 lbs
Total: 1315 Lbs