Having been a professional comedy writer for over 40 years now, I am more than confident in my assertion that the key to writing is rewriting. All ideas, no matter how noble, will realize their ultimate merit after a series of revisits and tweaks. Sure, some attempts will near their mark in fewer tries. But virtually no piece of writing is exempt from this arduous process.
To this day it continues to amaze me how even a seemingly simple task will take much longer than anticipated. For example, in the above photo where I was merely practicing my signature, I went through three legal pads before spelling Zweibel properly.