Before you make a presentation, think about your audience. What do you think they know allready? Estimating the knowledge of your group, can be very difficult, especially if you work with mixed groups or in an open setting like for example a festival. If you notice the group seem to need more basic knowledge, or more high level content while you present, it can be good to have thought about how you can tweak your presentation so that it becomes more understandable, or include more of the experiences of the group.
One way to make your presentation more interesting and participatory, is to ask the people who will attend to bring an example of creative activism they found inspiring, and then integrate the input in your presentation.
You can structure best practice examples and presentation either around properties such as "suprise effect" and "humor" or according to techniques such as "invisible theathre", "flash mobs", "interventions in public space", "media tweaks", "adbusting" and "hardware hacks". If your audience has brought examples, you can sort them in this structure on a wall, or ask them to what kind of catagory their example would belong. Be prepared to add new catagories.