Pablo Picasso was a prolific artist, both in his art and in his philosophy on creativity. I've drawn so much inspiration from him when it comes to "breaking the rules" in art. Here is one of my favorite quotes:
When I started today's painting, it was textbook good, but boy oh boy, it was boring. I put it in a sunny window to dry, and forgot all about it. It was THAT boring! I pulled it out this morning and armed with some Picasso inspiration, I went to work on it again. I decided to make this painting more about the BACKGROUND than the objects in it. I threw on paint with abandon and then scraped away with palette knives and a spatula. Once the rules were completely broken, I felt more satisfied.
"Girl Before A Mirror", Pablo Picasso