As a current editor and former grammar teacher, I was stopped in my Web-surfing tracks by this:
Know the rules, and the rules will make you free.
The most typically inspiring words to writers focus on growing wings, dreaming big and believing hard enough. This grounding, practical advice stresses working within confines and structure first; the wings follow.
Rules abound in writing—enough for everyone to follow some and ignore others.
What rules do you follow in your writing? How do they help you?