Take a large step forward and space your feet at hip width.
Bend your front leg until it's at roughly 90 degrees and your back knee is close to the floor.
Extend back up to standing and repeat.
Striding too far forward.
Too small of a stride forward.
Hips caving inwards on the way down.
Place the bar across your hips and place feet evenly on the ground.
Raise glutes until torso and quads become straight.
Slowly lower until torso and quads make a 90 degree angle, then repeat.
Placing feet too high, restricting the top of the movement.
Rushing repetitions, using momentum.
Placing feet too low, restricting the bottom of the movement.