* Never give false options. Do not create multiple options that lead to the same result. It insults players' intelligence and does not reward them for the choices they make.
Doesn't this not matter so much now because of what has been said that there are no negative consequences for your dialogue options? That if you make a mistake you can easily come back and try again/different dialogue choice? I am pretty sure I remember reading something very close to that about this new game, but never remember hearing anything about that with Fallout 3. I sure don't approve of you say being able to piss someone off with your dialogue choice and then coming back right quick or even awhile later and doing it over with a totally different response as if the prior never happened. In not having false options is a good idea, but like it was said earlier in this thread, it can be done well.