This is the support deck for an introductory class I made for Junior Designers, Developers, Product and Project Managers to introduce them to the proper way to use wireframes. I did this class already multiple times at General Assembly (London, UK), TechLab (Santa Clara, CA) and internally in my consulting job. It's updated to OmniGraffle 6. Same presentation, with Keynote: http://www.slideshare.net/folletto/introduction-to-building-wireframes-with-keynote