I have a great document about it, but it's non-English.
A couple of pointers:
Bar high
Grip bar with a false grip (less tension on elbows)
Grip narrow to create a tightness
Flex abdomen, the whole body
Stand straight up with the weight in the rack, wait for blink of a second, until the bar don't have momentum
Chest high
Take strides back, get into a semiwide stance, outside shoulder width.
Do not look down on foot placement at any time
Start the motion down slowly the first few inches, then rapidly increase the speed
At all times, chest high
This would be useful in a USAPL/USPF type of federation, with single ply.
In other federations, other techniques may be optimal.