Negotiation and the Global Information Economy Book

Like most self-help books, this book didn't need to be this long.

The recommended way to say "no" is as follows: "Yes! No. Yes?"

That is, first state the positive value you're seeking to protect. Next, state plainly and without insult your refusal to do what the other person asks. Then offer an alternative that might be mutually agreeable.

This actually works, and makes sense for a wide range of cases. It allows for the possibility of future cooperation, but also works if no such possibility exists. You can use it equally well with people you love and people you hate. It may help them see your point of view -- and even if they don't, you still get to make your choice.