I have been emailing with a local photographer who does our professional shots here at the hosptial. Here are some websites that she suggested to take a look at:

http://www.shootsmarter.com/ It is completely free and you could search composition and get some "smarticles" that could help.
http://digital-photography-school.com/5-elements-of-composition-in-photography
and this http://digital-photography-school.com/5-more-elements-of-composition-in-photography.