Be true to your creative voice.
That is sometimes hard to do. Every once in a while I start to doubt if what I'm writing is any good, or will have a positive effect in the world. That's when I have to remind myself of my purpose. I have it written on a sticky note attached to my computer.
The purpose of my writing is to create joy in my life and in the lives of others.
Well, I hope my writing creates joy in the life of others, but I can't really know or tell that until long after a book is written and published. While I'm producing something new, I have to ask if it is bringing me joy. Perhaps that's the only real measure a writer has. Does the writing bring the writer joy? I believe that when we stay tuned to what we love, we will write books that others will love as well. That's being true to your creative voice.