Some of the pointers (and exercises) in my upcoming vocal training CD will include how to say VAAGH to eliminate the nasal sound, and to improve your projection. Try this: Say VAAGH (the G being silent) ... make sure you open the mouth and ‘gradually’ drop the jaw – all the way down – as you say VAAGH. You'll notice that not only does everything come out the mouth, your voice is clearer and more powerful. This, I find, is one of the best ways to produce your real voice. Give it a go whenever you feel you're not hitting the mark with the tone when you sing.