Setting Side Cymbal	It is possible for you to use your ride cymbal or top cymbal on your right side as a crash cymbal. So, you put the side cymbal on your left in most cases. It would be better for the crash cymbal on your left side to be located where your left hand can easily reach. That is because you mute the sound by your left hand after the shot made by your right hand.
Variations of Setting	If you are to use 2 crash cymbals, it would be better to put one on your right and the other on your left. Before you put your crash cymbal on your right side, you put your ride cymbal first.
Angle	Basically sustain will become longer if you put the cymbal in horizontal setting. If you consider the height and shot angle, it might be good to lean your cymbal a little. But keep mind that tightening the screw too much would not only hold down sustain but also restrain the free movement of cymbal.
Height	It affects the look of the drummer from the audience and the movement of the drummer. If you consider the location of the microphone, it might be good to set it higher.
Setting Splash Cymbal	Since you need it for quick shots, you put it relatively closer to yourself. Generally you put it in a position where both hands can easily make shots.
Setting China Cymbal	Since it is a big accent shot with big volume, it is advisable that you put it on high position. In most cases, you put it on your right, in high and outside position.