http://robertsontrainingsystems.com/blog/round-back-deadlifts/#more-1921
http://robertsontrainingsystems.com/blog/deadlift/
Two awesome reads. I haven't gone through all of the second on yet because it is loooooong.
Just reading the first of these, I REALLY like this:
Take a breath in, and then exhale slightly, allowing the ribs to come down.
Now, while keeping the ribs down, take a fully breath into the belly. It may help to think about breathing into your back.
From here, brace your core and lower back for the best of both worlds.
Just stood up and tried it, very noticable difference. Whole trunk feels solid. I'm guilty over hyperextending for squats especially, so gonna try this cue out this week!