I know it has been said but... RULES are to be broken. Don't be so rigid, Know when to break them.
Photography is an art form not an exact science. A picture i.e. works or it doesn't.
However one should get the basics right, with a thorough working knowledge of Composition, harmony , color etc. One way to learn this is viewing thousands of pics from the past masters and/or brilliant contemporaries.
Class dismissed!
