English as a second language: some attendees may not be native English speakers. Consider the pace at which you speak and the complexity of your phrasing.
Share the high level, not the details: convey what you’ll cover in the AM and PM, but don’t share the time stamps. This allows you flexibility to modify your agenda on the fly based on real-world interactions.
Relax and know that workshops are messy, unpredictable and will never go to plan. Stay open and confident in your plan. If you’ve made it this far and thought through the details, it means you’ve done some strong planning and you’ll be able to adapt to unexpected hurdles that arise.