This is from a TED talk at
http://www.ted.com/talks/omar_ahmad_political_change_with_pen_and_paper.html?utm_source=newsletter_weekly_2010-04-27&utm_campaign=newsletter_weekly&utm_medium=emailFirst he says, write a paper letter, and write it BY HAND.
And write once a month.
Then, "in paragraph number one, what I'm going to tell you to do is very simply this: You appreciate them. You may not appreciate the person, you may not appreciate anything else, but maybe you appreciate the fact that they got a tough gig. When animals are going to make a point, they make the point. They don't spend a lot of time dicking around. So, here you go. Paragraph number two, you may actually have to get very blunt and say what's really on your mind. When you do this, don't attack people, you attack tactics. Ad hominem attacks will get you nowhere. Paragraph number three: When animals are attacked or cornered, they will fight to the death, so you have to give them an exit. Most of the time, if they have an exit strategy, they should take it. Obviously, you're intelligent. If you had the right information, you would have done the right thing. Lastly, you want to be the nurturing agent. You're the safe place to come in to. So, in paragraph number four, you're going to tell people, "If no one is providing you with this information, let me help.""
Makes sense, but helpful to have it spelled out. MORE tips at the link, where you'll find a transcript as well as the video.