In solitude, organize your writing area. If you don't write on computer, lay out two pens, just in case. A pad of lined paper is helpful.
Set fire to the area. Let the room get good and scorched before you douse it. Smoldering embers in a few places are okay—there's nothing like the threat of combustion and smell of smoke to inspire a noirist.
Sift through the ashes of your possessions and grab whatever material is still left to write on. If the computer and pens are destroyed, open a vein and write with your own blood on the sooty wall—blood and grime contribute mightily to noir. Anything you write at this stage will be brilliant because it contains the
four five essential elements of the genre: loss, pain, desperation and truth about human nature. Let's not forget a glimpse of mortality.
If—unlike lions of the genre such as James M. Cain, Raymond Chandler and Jim Thompson—you are unable to reduce your life to ashes for the sake of art, all is not lost. But you must find a way to reach this state mentally before picking up a writing instrument. Bring devastation and lost hope front-of-mind and feel them so sharply that they drive away everything but truth. Particularly destructive to the noir oeuvre are shreds of level-headedness, dignity and esteem. Reckless abandon is a bonus.
Follow these 4 simple steps and any writer, no matter how new to the genre, is assured of creating memorable noir. Go do it. May your words burn bright.