In snooker and pool you need to visualize your positional shots and the path of the intended line of the ball. After deciding on the shot required you need to visualize an area on the table of around 1 foot if possible and get into that area. Many top level players at first try to be to precise on position and if they don’t achieve the end result ca still be thinking about it during the next shot.
So basically there are three positions you want to play and look for and that’s straight, high or low on the object ball.
The use of side from all of these positions can help vary the path of the cue ball for the next positional shot but remember you only need to land in an area not an exact point.
If your position isn’t what you played accept it and move on and make a new plan.