Pulitzer Prize winner Jennifer Egan gives insight into her writing process (she writes out her work on yellow legal pads without re-reading a word until she starts feeding the words into the computer).
First drafts:
A first draft takes about 10% of the total writing time, but in terms of importance it's probably 50%.
Outlining:
I don't outline initially. I outline everything in revision. Some of my revision outlines are 50 pages long.
Revision:
Usually my books go through three or four big drafts, with each big draft reflecting 20 rewrites of each individual part. When I get to a full new draft, it means I've made enough changes to all the parts that I'm willing to look at it as a whole.
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Do you, as a writer, take this much care with your work?