You should incorporate your branding phrase about six times in a 60-minute presentation. Always begin with it and definitely end with it.
Brand yourself, brand your message. Rinse and repeat for continued success.
Oh, and don't be surprised if, at the end of your presentation, when you're mingling with members of your audience, folks start approaching you, slapping you on the back, and repeating your phrase over and over again. That's when you'll know you've done your job!