Related: Pump and Flush Training by Kris Gethin
Having said that, "working at it" will only yield the results you're after if you're doing things correctly. Making your back grow will be a much more straight forward process if you do the following 3 things.
100 rep deadlift challenge | Bodybuilders vs. Powerlifters Featuring Kris Gethin and Marc Lobliner
How to Build a Big Back
Trick #1 - Retract And SqueezeMaking the muscles across your back contract is an art. You have to always think "retract and squeeze."
The first point refers to the retraction of your shoulder blades, they need to come all the way back. Once you do this, you then squeeze the muscle momentarily before releasing. Using momentum alone, yanking the weight down won't be enough.
Trick #2 - Do EverythingWe're all guilty of enjoying some exercises more than others which inevitably means we don't do enough of the ones we don't like. The back has 4 major independent muscle groups:
Trick #3 - Don't Forget the Basics
Have you ever seen someone deadlift or rack pull 6 plates aside for reps and look small from the back? Me neither!
Let's not forget that along with all this superb emphasis on tension, there's also a real need for moving heavy weight from A to B. Get your rack pull or deadlift up and your back will succumb to the force.
It's often said that people struggle to get any sort of connection when they train back, like there's no pump happening. An easy little trick to fix this is to use Pre-Kaged before the workout to enhance your neurological connection which is where this intense sensation derives from.