Have your mind follow the breath, connect with deep smooth breathing; breathe from the lower abdomen. Be natural as possible in the beginning avoid deep creative visualization in the beginning.
Make sure your shoulders elbows are not held up but, relaxed, fingers seperated, head supporting the sky, be natural as possible dont force anything when practicing.
I recommend Sifu Fong Ha's DVD on his website, he has studied and taught this system since the early 1970's. He offers a in-expensive book also.
website
http://fongha.com