"True ease of writing comes through art, not chance,
As he moves best who learns the steps of dance,
'Tis not enough no harshness cause offence,
The sound must seem an echo of the sense"
Learn the rules, then maybe break them.
Did I just equate my work to Picasso? . . . I think I did!
"Picasso didn't start with painting women with three eyes and square breasts. He knew how to paint a cow."
Creativity always happens when I'm editing what filled the structure. The basic rules I lay down in advance make sure I get to that point.
And to bring this back to visual arts, it's rare to find a good artist who doesn't study references and do thumbnails.
One of my favorite bands is Maiden, mainly for the fact that their songs have the ability to capture the energy of their lyrics. Which is exactly what Ozzy has when singing Iron Man, Crazy Train, Bark at the Moon and even with his modern stuff.
Of modern bands I'm hard pressed to find bands that adequately capture the energy of their lyrics just right. I really only have Coheed and Cambria who can nail so many different musical styles with the right energy for their lyrics.
As for breaking the "rules", the theory goes you have to master the rules to break them. Expressed in a more technical way, once you know the rules, you know when and were it's ok to break them, and you can also adhere to most of the rules while only breaking one or two.