I confess... if I typo a Facebook post I will edit it. I know it's only Facebook but it's an editing sickness.
Write like you speak with the 'rhythms of human speech,' as William Zinsser said, and in as few words as possible. Use action verbs to carry water.
People who make snide comments to authors like "anyone can write a book" or "well, you did it, so obviously I can/it can't be that hard" or poke at a book because it's "romance" or "genre fiction" and...