Our reputations ultimately rest on what others think about us, and that is heavily influenced partly by what we do and how we do it and what we say and how we say it.
As the cliché goes, "action speaks louder than words", but actions count for little when you're in a face-to-face situation (unless you're having a really weird day...)
When people meet us for the first time, I'd guess that we're mainly judged - rightly or wrongly - on the strength or weakness of how we communicate verbally.
Forget what you've read about the controversial 7%-38%-55% rule; how you say what you say matters.
Read this excellent presentation from James Hurford on how to speak, persuade and communicate more effectively.
Thoughts on customer service, communication and, of course, reputation management.