If you write a good action sequence well in a novel, you're already writing it for film, because the only way to do it well is to use some of the same tricks. They're rhetorical, not visual, but it's the same move.
In my own worst seasons I've come back from the colorless world of despair by forcing myself to look hard, for a long time, at a single glorious thing: a flame of red geranium outside my bedroom window. And then another: my daughter in a yellow dress. And another: the perfect outline of a full, dark sphere behind the crescent moon. Until I learned to be in love with my life again. Like a stroke victim retraining new parts of the brain to grasp lost skills, I have taught myself joy, over and over again(15).