Always begin with the phrase "You know how" followed by a couple of common problems your clients normally experience. Then follow up by saying, "What I do is" and continue with several key points, benefits or value propositions as to how your product or service solves these problems. For example, if you are a consultant, you can say, "You know how some businesses experience poor staff performance and productivity which can wind up costing the company time and money?" Allow the person to respond, demonstrating you have their attention and they are interested in what you have to say.