I’d say my biggest advice always is to just finish. Even if you think it’s a hot pile of shit. I think a lot of people get stuck in a trap of trying to perfect the first 20 pages and are too hard on themselves. Once you have a full 3 act script you really start to see what the movie is. It’s also important to remember that if you’re lucky enough to sell something every single step of the way there will be notes. Studio, producer, director, actors, so the draft will probably unrecognizable by the time it gets to the screen.