How to make your presentation more persuasive?

When we make our presentation (offer) during a negotiation, we always have to take other party's interest, concern and fear into our consideration. Then we produce a proposal mutually acceptable. Nevertheless, such a win-win proposal cannot always be attained, though we aspire to and work hard on it. Sometimes, we still have to use "persuasiveness" to present our points in a sophisticated way -- never to offend or irritate the other party you are negotiating with.

Usually, the "persuasiveness" can be achieved by:
1. challenging his (her) needs
2. challenging his expectation
3. challenging his power (including the figure, parameter, examples, precedence he raises)
4. winning his fondness (liking) for you