sorry I just realized I had neglected to reply to an earlier reply of yours regarding bad habits and practicing speed. Well if you have bad habits, you have bad habits period and those need to be corrected. And Yes I do understand very well that most people who have bad habits may not be aware of them...this is why (among other reasons) I have written numerous articles on studying with a great teacher, choosing a teacher, etc.
you are welcome to check out those articles here:
http://tomhess.net/articles.php
thank you
Tom Hess