2. Just Finish The Damn Thing
More than any other, the best tip screenwriting tip anybody can offer you is this one. Because ultimately, what use is a screenplay unless it's right there in front of you? Just like with the novel, your first draft is your outline - something you can build from. And once you've got 90 pages down, you've done what many consider to be the hardest part. Though that's not necessarily true when it comes to screenwriting, you've certainly done yourself a huge favour. Now comes the hard work. Which is, yes, whipping the thing into shape and making it into a product - something that a producer can look upon and instantly recognise as something that's "working" (and within just a few pages, too). But you can't whip anything into shape unless it's written, and just getting it down on paper - having all your ideas right there in front of you - is a great way to begin your journey. You'll go through 30 more drafts, of course, and the editing process will likely push you to the edges of insanity... but once it's written, it's written, right? Nobody can take that away from you.