I can't possibly add professional proof reading to my costs
Actually, I used to think along those lines too, but it changed rather quickly one day after I found out someone was really mad at me after getting just a one-liner "I will get back to you shortly" email from me.
Upon close examination I noticed (to my horror) that I had sent her a oneliner quick-note that read: "I will get back to you, Shorty." -and as my luck would have it she is actually vertically challenged.
Obviously, I was not paying close attention to how MSWord was auto-correcting/punctuating my email.
Needles to say, even thou I now poof reed all my stuff, I now dip down that a sleep-up is hound to boccur someday...