You really do only have one chance to make a first impression. Trite, but true. But it's not just about grammar and spelling, it's about readability. Is your writing clear enough that your ideas can shine through? Do your readers ever have to stumble through run-on sentences or wonder exactly what you mean?
START NOW by using this five-step readability checklist to improve anything you've written. Style Guide readers, see page 99 for a link to the list of "troublesome words" and make sure you're not making these common writing errors.