As promised

As we know there are many kinds of billiard:pool,snooker, cannon(carambol) etc. Each kind may have devision on different games,for example pool can be played as 9-ball,8-ball etc. But in order to play well in any kind of billiard you should know the key points of playing. That includes not only rules, but the way you stand when you strike or the way you hold the cue.
First about the position. There is no stated for everyone, but while making a strike you should place most of your weight in the legs,the position should be balanced and your forearm should be perpendicular to table.
Now about the way you hold the cue. Again there is no stated rule about it. The cue should be parallel to table and should be fixed in x-y plain so it should go forward or backward only in z-axe:).
Usefull exercise for the beginners is to strike in the middle of the ball perpendicular to any cushion. When you make the strike you should leave the cue in the position at the moment of strike. If you do everything right the ball will come back to the top of the cue.

here some videos: