Yup, you can't wait around for the muse to strike. She's either too busy or too fickle.
I love this from Joann Ross:
An important thing to keep in mind is that while editors like brilliant authors. they love prolific ones. This means you're going to need to show up every day prepared to work, the same as you would any other job. Can you imagine calling a plumber or the fire department or showing up at an emergency room with a heart attack and being told the people just didn't feel like working that day?Before you all clamor that this feels way too stultifying, I hasten to add that I have a very broad view of what constitutes writing. It's not just getting words on paper or screen. It's the minute by minute cogitating while walking the dog, washing the dishes, throwing the frisbee with the kids. So, in my definition, you don't have to feel like a failure if you're not butt-in-chair all of the time. Writing is a lot like playing. Thank God the imagination is such a grand playground.