Better communication with non-technical people?

tinpan writes: I've got a communication problem. When non-technical managers ask me to explain technical choices, they often make choices I recommend against and they later regret. I can tell that they do not understand their choice because of how they are explaining things to each other, but they usually refuse further explanation.

So it's time for some education. I want to get better at communicating technical subjects to non-technical people. More accurately, I want to get better at helping non-technical people make better technical decisions and I'm willing to accept it may include some understanding of "selling your idea."

What books, online courses and/or seminars do you recommend and why?