What the heck do you do when you fall down? I'm not going to give you a complete step-by-step because, let's face it, you already "know" what to do. The problem is you're shaming yourself for having fallen in the first place. So THAT'S where you begin when you've fallen down. You drop the shame, pick yourself up, and write a new part of your story. There's nothing wrong with you. You're just on an incredible journey. Live that journey.
