Consider your props. If changing your shoes and putting on a sweater like Fred Rogers seems a bit much, consider changing your outlook with a small change. Years ago I saw Anne Sexton’s eyeglasses on display at the University of Texas’ Harry Ransom Center. Oddly, it was deeply affecting. What does your writer’s outfit look like? Try a hat, a headband, a particular piece of jewelry, and see what works. If you have a lucky shirt that you wear hoping your favorite team will win their game, why not a lucky writing shirt too?