Writing habits. Your protagonist isn’t the only one who has character traits or things that get in the way of their goals. Look back at your previous writing projects and take stock. Where and why did you fail in the past? Is the hardest part for you getting started? Sticking with it? Moving on to the next shiny thing before you finish your most recent project? Is dialogue or description particularly hard for you? Is it a matter of time management, or did you lose your project to a failed hard drive?
You can’t always fix your past mistakes, but you can try to learn from them. What are you going to try doing differently this time to do better, to finish, or to get going in the first place?
Action Plan: Make a list of traits that have slowed you down or made writing harder for you in the past, or identify the particular elements of the writing craft that are a struggle for you. Brainstorm some ways to overcome or compensate for that particular problem, or ask a friend (or the internet) from some advice. You could make a point of practicing a solution for that particular weakness during NaNo, or come up with ways you can avoid it entirely to avoid getting bogged down. Of course, don’t beat yourself up for not being perfect. None of us are.