a metaphysical technique for DIVINE inspiration
Roy Masters, a radio guru of the sixties and 70's had a great method for contacting your higher self in an instant, getting focused, and allowing a CHANNEL to the infinite or your own higher form, through which inspiration would come to the writer.

One would sit in a yoga position, the lotus, or cross legged, or even in a chair. One would put his hand in the air, in any area comfortably down by your side, ask God or your guardian angels, or spirit guides to lift your hand, and wait until the higher forces lifted your hand and made it float.

That effort (well, not really EFFORT---more like that releasing of your self to another force that moved you,) would trigger the meditational, reaching out mind.

You could do it the Buddhist way, link Jupiter finger and thumb in the Gyan Mudra. The other three fingers are straight-ish, you see buddha statues in that pose.
gyan mudra

Use the position or not, just concentrate on the higher self grabbing your right hand and lifting it. Invite muses to tell you when they arrive by lifting the hand. When you feel something lifting it, they are there. Ask them to help you write what you are writing.

A). Focus on the words you have already, or the ideas. Let them find your place on the page. Presumably you have a PC screen with words there. You can go over them now. Hemingway used to re-read the work that he'd done yesterday to know what to do today. He would work on that day only while he was supplied with ideas, stop when it was going well.

B.) If you haven't started yet, ask God to give you your first scene as a daydream vision. Exclude mental ideas, verbal concepts or recent thoughts. Ask your soul to show you the movie IT wants to make. Channel the thing, scene by scene. Doesn't matter if a book or a script. See it as visuals, as if you were watching the finished movie. MAKE NOTES as you go. Not focused on paper, more like a scrawl on the big page of a legal tablet. Use a fine point marker not a ball point,for easy writing without looking.

When you have an outline for an entire script, the writing takes 4 1/2 days flat. NOVELS take way longer as prose styling is tedious! Demanding.