Forget plotting or sounding out your dialogue. Half the time, the greatest struggle with writing is the fight to just keep going. To that end, anything can potentially help.
Greta Gerwig, who’s adding a sideline of screenwriting to her acting career, gave this advice to the New York Times Magazine:
I have gotten into baseball recently, and whenever I have trouble writing, I think about the pace of baseball. It’s slow. You strike out a lot, even if you’re great. It’s mostly individual, but when you have to work together, it must be perfect. My desktop picture is of the Red Sox during the World Series. They aren’t winning; they’re just grinding out another play. This, for me, is very helpful to have in my mind while writing.
Keeping up spirits matters. Be your own cheer squad if need be. Whatever it takes to grind it out.