I have just had a very valuable lesson where the main topic of our connversation was "efficiency of playing" - getting the basics right. To cut a long story short - if the basic set up isn't right (for that individual), i.e breathing, the use of the breath, lip position, pressure etc etc is there anypoint in practising? What is too gain from practising a couple of hours a day incorrectly? Surely the benifits will be limited and unsustainable. Speaking from past experience i know that it is pretty much pointless. During university i would practise a couple of hours a day - but my playing didn't really improve (over 4 years). A very slight stamina increase but nothing to write home about. I'm pretty sure the same results could be achieved by only practising 2 to 3 weeks prior to a contest. I have heard of and know people who practise hours a day - but they aren't world beaters - why? Just wondering what other peoples views are on this subject?