Ann on Saturday, oh woe, what do I say? The LadyKillers this week have thoroughly covered the Edit(or) topic, from Mysti's great post on the power of a single word (a word your mother and Miss Manners would approve of), followed by Priscilla's fascinating commentary on editing past and present, then with Terry's confessions about becoming her "own editor," moving on to Staci's parade of editors--from critique group to her Kensington editor--wrapping up with Margaret's excellent 12 Tips for Self-Editing.
(Well now, that previous sentence could certainly use a good edit. And did I REALLY forget the last "e" in "else" on the title?? ;-) )
I guess I could add one more thing to Margaret's tips:
Don't wait until the last minute to draft a deadline-driven project (whether it be a blog post or a technical proposal). Budget in time to let your rough draft breathe and your mind rest. When you come back to it, you'll be able to see it with fresh eyes and catch all those little oopses that can slide right by.
If you don't allow yourself enough time, well, that's where the "or els" comes in...