I'm not what you would consider an instructor but am advanced enough to get annoyed when looking for info on using advanced techniques for position play and shot making. It seems that most instructions and books are so directed to basic shot making.
The most valuble shots I have in my arsenal at this point beyond the basic shot making are being able to consistantly judge and make throw shots, squirt and curve shots. They have gotten me out of more snookers than I care to count. Practice your throw and curves and you will leave your opponent wondering how you made that shot when he knew he had you snookered. It is something that is not commonly taught and many players unless very advanced ever even know. Learn these shots and you will add a whole new dimention to your game and skill level from getting out of tight spots to position play and leaves. I'll leave it to the instructors to tell how but Robert Byrne's goes into some detail in his book Advanced Techniques in Pool and Billiards.
