Some of the most technical lifts are the ones in which you have to pick up any type of load off the ground. For example the power clean or dead lifts would be two very difficult lifts in terms of mastery. But one of the things that make my back about explode is when I see someone blow up a bar from the ground as fast as possible without being under control. It would make sense that if you are power cleaning or dead lifting that you want to stand it up as fast as possible to reduce time under tension but that isn't taking strength curves into account.
The body has favorable positions for force generation in which they can apply force to the greatest extent. This is due to muscle/joint moments being at the most specific angle, and muscle tension forces in favorable length for exerting maximum force.
Taking the dead lift for example the most favorable position is when the bar is at the knee joint. This is where you would want to accelerate and exert maximal force. From the bottom is then you want to be as stable as possible pushing feet hard, but under control, through the ground until reaching the knee joint which your cue would be ACCELERATE!
A great example of this would be from a clip at Joe Kenn's you tube page. Listen to the cues. There are only 2 or 3 which is good because they are simple cues and effective. Push/accelerate.
Link:
http://www.youtube.com/user/bighouse77#p/a/u/0/J3TQ0EXPpfA
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