The single most important thing you can do to improve your aiming is not to memorize some secret system, but to OBSERVE the results of each shot. Are you missing too full or too thin? Tells you what you are actually aiming at. If you shoot the same shot 20 times and your aim is true the misses should be equally distributed between full and thin. Then you know the errors are caused by other factors such as an inconsistent stroke. Even an absolute beginner can make use of this advice. It doesn't matter how far they miss, just which side the ball goes to. (Usually too full for amateurs).
This advice is surprisingly difficult to follow. We are not accustomed to carefully observing the results or our shots. When I made a determined effort to apply this I discovered that even on shots where I had a fairly high make percentage I was always going into the full side of the pocket and all of my misses were too full. A simple correction yielded fantastic results, but I had to work hard for months at recalibrating my aim until the correct aim felt natural.
We all need a POST-SHOT ROUTINE just like we need a pre-shot routine. Remain still and see where your tip is pointed. Most important, observe where the object ball went.
I hope that I don't need to add that you need to hit a lot of balls to know where to aim. The "hit a million balls" method that John Schmidt recommends is not realistic for most of us, but even 20 balls each from various angles will tell you a lot. Repeating this every couple of days will help reinforce your learning. Knowing what to do is useless; being able to do it is everything.
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That might not be the best advice other then that I agree with you.
The key to getting good at pocketing balls is knowledge of the hit.
Observing what your seeing is also key.
I wrote some where a while back I actually practice missing balls(i was good at it.lol)Both sides, thick and thin.Does wonders for you especialy when your really observing things.When just practice making them which it alrite you create that one picture,when you practice on both sides of that picture that one picture becomes strong.(Just my opinion)