This kind of attitude is my approach to so many things. You’re automatically accepting defeat if you never start. If something is scary or difficult, most people will never attempt, so if you even try, you’re already ahead of the curve.
The other big help I’ve found is leanring to think of yourself as a writer. The Willpower episode of Where There’s Smoke did a good job explaining it. If you don’t consider yourself a writer, it’s nearly impossible to have enough willpower to make yourself write. You’ll constantly be sabotaging your own efforts. But if you start calling yourself a writer, thinking of yourself as a writer and investing your energy in thinking about writing, you’ll start to do the things that a writer does.