"Assume every editor is looking for a reason to say no. Don't give it to them."
Monica Trasandes, 6 Keys to Revising Your Fiction, Chuck Sambuchino's Guide to Literary Agents Blog.
I've heard this before in different ways from different sources. Right now, I'm immersed in a tough revision. This reminds me to work a little bit harder, to not be satisfied until I've written the best story I can write. I love the other tips in this article too, especially the one about not getting stuck at the beginning.
Sneaking back to my writing now, determined to move on from the place I've been stuck at for several days (it's not the beginning, but it's been holding me up).