Doing heavy deadlifts was a little goofy for me after spending so much time swinging heavy kettlebells. In a swing, it's a snap! Literally. You snap your hips and BAM. Lift accomplished.
In a barbell deadlift, it takes a bit more stick-to-itiveness. You have to dig in your heels, keep your chest up and stay with the lift. No rushing. No standing up before the lift is done (aka stripper deadlifting.) No quitting in the the first 5 seconds.
Fun part! Sticking with the grind and feeling out a slow pull makes snapping SO. MUCH. EASIER. My swings got more powerful -- and snatches? I don't reallllly have to train much for a snatch test any more. When you're regularly picking up way more than you weigh, a 16kg kettlebell feels like nothin'!
and because I can't leave things in the weight room....
Take this home:
Learn to keep at it. Ground strongly while keeping your heart open. Don't quit too early. But know when to walk away and try another day. When you've learned stick out the truly heavy stuff in your life, other pieces will just snap into place.