Persuade your Audience without Tricking them

1: Logical arguments are the most basic type of persuasion. If you can use facts, figures or basic logic to help show that your point is correct, it is hard for your audience to ignore. For instance, discussing the benefits of a product as would show how your company is superior to the competition.

2: Focus on your audience's FEELINGS. A message will always be more persuasive if you can include things that your audience has strong attitudes about. One way that you can do this is to tie your message to the EMOTIONS of the audience. For instance, if you know that your audience is afraid of losing their savings, show how your product will help protect their financial security.

3: You should also be aware of your audience's VALUES i.e. those things that the audience thinks are good or desirable.

4: Use your CHARACTER to make your point stronger. It may seem unfair to some, but WHO you are will affect how an audience receives a message. Therefore, you should do everything you can to show that you know what you are talking about, that you are trustworthy, that you care about your customers, and that you believe in what you are.

Reference:
http://www.ed-u.com/persuadingyouraudience.htm