This video does an excellent job describing ethos, pathos, and logos. It specifically focuses on identifying these techniques in writing or a speech. I use this article to teach my students about evaluating speakers to determine their credibility.
This article provides strategies focused on building logos in a speech. My students use this article in conjunction with the ethos and pathos articles to make sure they include a variety of rhetorical appeals in their speeches.
This article provides an extensive list of strategies for creating pathos in a speech. My students find this list helpful when they are looking for ways to balance facts with emotional appeal in their speeches.
This article gives examples of how to create ethos. I use this article to support an in class activity where students read the list and then brainstorm ideas for how they could use this in the speech they are currently writing.
This article gives an excellent overview of the rhetorical devices ethos, pathos, and logos in the context of a persuasive speech. I have used this article as review material for students after I present the topics in class.