Someone turned me onto the "Rule of Thirds" for composition.  Really helpful!

http://painting.about.com/od/composition/ss/art-composition-rules.htm

In the following thread, at the bottom, JQP offers some suggestions on search strings for information on composition.

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2691662

Quote - Searches like "elements of composition," "elements of design," "rules of composition," "rules of design," might be helpful.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi