Scott Adams on becoming a better writer
Scott Adam's "The Day You Became a Better Writer" is a great read and bonus, it's short. :o)
"Business writing is about clarity and persuasion. The main technique is keeping things simple. Simple writing is persuasive. A good argument in five sentences will sway more people than a brilliant argument in a hundred sentences. Don’t fight it."
What can I say? The man speaks to me.