If you have a desire to write, but can't quite get to it, set your kitchen timer for fifteen minutes. You can do anything for fifteen minutes. Early on in these writing sessions, allow yourself to quit when you hear the timer ring. As your writing habit develops, you'll learn to ignore the bell. Before long you won't need to set the timer. You'll simply sit down, open a vein, and write until you're spent. One day you'll come up for air from a writing session to find you've been at it for a couple of hours. Then you'll need to start setting the kitchen timer to remind you when it's time to pick up the kids.