I haven’t tried these, but people tell me they work:
1. Write yourself a permission slip. Give yourself permission to be awful. “Dear World, Please excuse Chloe for being a talentless hack. She can’t help it. Don’t judge. She’s doing the best she can. Love, Chloe”
2. Visualize, then banish your inner critic. Get a good mental image of your inner critical voice. It might resemble one of the monsters from Where the Wild Things Are, or your alcoholic uncle, or your eighth grade English teacher (Oh, by the way, fuck you, Mrs. Valensky). Once you can clearly see the critic in your mind’s eye, banish them!* I would imagine flipping Mrs. Valensky a quarter and telling her to go see a movie.
* In accordance with emerging contemporary practice, I’m using “them” as a gender-neutral pronoun. Suck it, old school grammarians.
Let the wild rumpus start!