Take a look at this fantastic set of worksheets on persuasive writing. It contains a number of annotated exemplars of persuasion across different genres, checklists for students, and some practice tasks.
This link is an interactive persuasive mind mapping tool. Students can plan out a persuasive essay using this site and the program will generate a graphic organizer for their essay which contains the information they inputted.
This infomercial is a great example of a persuasive text as it clearly displays a variety of persuasive devices; rhetorical questions, emotive language, testimonials, descriptive language etc. I have found it useful in teaching students to identify and analyze persuasive devices. It will also inspire them to create their own infomercial!