Depends “what’s being ‘blocked.’” Some writing tasks are utilitarian just-gotta-get-it-done things: academic, work-related, post-event thank you notes. Don’t quite want to say “just do it badly,” but. . . done (at whatever level of efficacy). . . is “done.” You (pace Nike) Just Do It! For creative work, I’m a little torn. John Irving has referred to the “enema method of writing,” by which he means: “you hold things in until they just can’t NOT geyser out.” Mostly, I agree with that.