When I came in, I opened this presentation with a nice joke about myself and my success. It lightens the mood, it connects with the audience, and it breaks the ice to start talking about the topic.
This builds the credibility factor. You're telling a client what you can do for them and that you know the inns and outs of the situation. It's a real quick way to educate your client and establish what you're doing.
Want your client to be able to follow along in their head. You want to make the pitch so easy and predictable that the client knows what your saying and what you're about to say. The repetition sells the pitch.