Practice this with a plastic or wooden dowel about 1.5 meters long.
SET POSITION
1. Bar over base of toes.
2. Weight on front of feet w/feet flat.
3. Hips lower rather than higher.
4. Shoulders directly over the bar and arms hanging down vertically by the outside of the knee joints and elbows should be pointing toward the ends of the bar. Also, shoulders should be slightly forward and down (traps stretched).
1st PULL
1. Drive knees to rear while keeping the torso in Set angle
2. As that happens, balance goes to heels(it should feel like your driving your shin bones down through the heels on an angle.)
3. Sweep the bar inwards using your lats to make the bar do a pendulum swing towards you. (video yourself and see if you're making the bar come in diagonally towards your hips.)
4. Continue to drive up as the bar moves diagonally towards your hips. (As the bar nears your hips, your torso will tilt forward slightly. That's correct.)
The double-knee bend occurs as you reach about 95% of knee extension.
1. Keep you balance over the heels throughout this movement.
2. Allow your knees to travel forward and raise you back slightly.
(don't over do or over think this.)
You should now be in a position in which your shoulders are still slightly forward of the bar, you knees are bent to a greater degree(about what you would use to jump on a .5 meter box), your hips are slightly lower, your torso is raised and your balance should still be over your heels. From here, you start the explosive hip extension of the 2nd pull.
2nd PULL
1. Drive your hips upward with explosive force.
2. Allow your torso to get to a verticle position as your hips continue to extend towards full range of motion.
3rd PULL
1. As soon as your torso reaches verticle, (your bodyweight is probably over your forefeet now and your heels may be off the ground), shrug and pull with your arms to accelerate your descent.
2. Drive your heels back into the platform as quickly as possible.
3. Keep your torso facing as forward as possible as you squat.
If it was a snatch, the bar should be over the back of your head with arms reaching up and shoulder blades(scapulae) pressed together. If it was a clean, your elbows should be facing forward and your shoulders also should be forward, in front of the bar.