A little book with a big presence, I've been shameless in recommending to every student who walks into my studio. Why? It's the best thing I've read on the subject. Get it. Give it. Get off your duff and do the exercises. It will change how you practice, how you think, and how you sing. (That's three 'how's' in one sentence, which, if you listened to Verdolini Abbott in my last post, is the whole point.)
It's just the right size to stick in a stocking, n'cet-ce pas?
Find it at Amazon or at ITunes. You can put it on your IPad or iPhone, which means you have no excuses.
Do it now!