Write down the overall goal of the public speaking workshop you are developing. For example, the goal might be to increase the skills and confidence of beginning speakers or to teach expert speakers how to incorporate history into their talks.
Make a list of one to four specific outcomes that would let you know you fulfilled the workshop goal. For example, if your workshop is geared toward people with a fear of public speaking, one way to know you succeeded in increasing peoples' confidence in their speaking skills is if each participant faced their fear by giving a three-minute speech to the group.
Brainstorm the speaking activities, discussions, lectures and materials that could guide workshop participants to achieving the outcomes you listed. For example, you (or a hired presenter) could talk about strategies for enunciating and pacing during speeches. For a related activity, have a participant volunteer speak in front of the group. Give her feedback about her enunciation and pacing and have her give the same mini-speech again, incorporating the feedback.
Organize and prune the brainstormed material into a logical order that builds from basic to more complicated speaking skills. For example, how to stand and what to do with your hands are relatively basic public speaking skills, while incorporating props into your speech is a more advanced skill. Be sure to account for the amount of time you have to give the workshop, the experience levels of the workshop participants, and the different ways in which people learn. Note any handouts or other materials you will need to create.
Create any necessary handouts, DVDs or other public speaking materials that workshop participants will use. A sheet suggesting resources for developing different aspects of public speaking skills -- such as speech writing and utilizing humor -- will help workshop participants who want to continue to grow their knowledge after the workshop is over.
Type an agenda for the workshop, broken down into time segments of five or 10 minutes. Include detailed notes for each segment during which you will be speaking to the participants so you don't miss any important points. You might also wish to create a short version of the agenda so workshop participants know what to expect.
Practice giving the workshop. Adjust your approach, materials and activities as necessary to improve the workshop, based upon participant feedback and upon your observations of participant growth. For example, if at the end of the workshop you notice people still struggle with their hand positioning, you might make a note to talk about hand positioning in greater depth the next time.