It gets to paper eventually. First, I compose a mental screenplay. Over and over again, I set the stage, call for action, and monitor the results.
When I am satisfied with the way the characters interact, and the action sequences, then I sit down like a movie critic and write the details.
This works for me. Your mileage may vary.
There is also a review, rewrite, polish and print phase. That's when it gets to paper. I like the feel of a printed document, and I reread and rewrite from that document.
As I find errors or awkward phrasing, I change the memory in the computor. Slowly it gels into something I can take pride in.
Most of my writing gets very little revision, primarily because I've done the prewrite finagling already.
(Poems are different -- but I've already described that.)