One of the biggest debates regarding the Olympic lifts in training for athletes is the skill involved in Olympic lifting. There is definitely skill involved but the carryover to the playing field/court is so immense that improving this skill is a must.
Sometimes just repeating the clean and jerk and snatch over and over is just not going to be enough, you must include some accessory lifts that can truly improve the skill required to complete the actual movements.
The two following movements are excellent at improving skill but also at building strength and explosiveness. These are not time wasters, they will immediately improve skill and power, and if you ask me that is a winning combination.
I like these two movements because they tell you where you have weaknesses right away. They require execution, strength and power to complete.