Take a breath. Really, take a deep breath before you pick up the phone. While you're at it raise your arms, lower your shoulders, sit up straight, smile then make that call, walk into the meeting, take the stage. Speech patterns and bad habits can tune your audience out, even an audience of one, before you get further than your introduction. This will cost you revenue and waste everyone's time.
Take tips from voice and dialect coach, Susan E. Finch. This show should have been a video - it was so much fun and packed with applicable tips to keep you from being annoying. The biggest culprits? Women! Women 17 - 35 and this voice fry issue where they sound like they are swallowing their words. Next, the gutteral hiccup - that punch that only belongs in the Cockney community in London.