from:     http://en.wikipedia.org/wiki/Propaganda

Propaganda: Techniques of propaganda generation

A number of techniques which are based on social psychological research are used to generate propaganda. Many of these same techniques can be found under logical fallacies, since propagandists use arguments that, while sometimes convincing, are not necessarily valid.

Some time has been spent analyzing the means by which propaganda messages are transmitted. That work is important but it is clear that information dissemination strategies only become propaganda strategies when coupled with propagandistic messages. Identifying these messages is a necessary prerequisite to study the methods by which those messages are spread. That is why it is essential to have some knowledge of the following techniques for generating propaganda: