Offer quick resources - Slide Support: Offer pre-made templates or visuals, or suggest using a whiteboard for impromptu diagrams.

The success of any speaker at all depends on his support system,the following will also spur great public speaking: Practice sessions Resources like pictures,diagrams,videos and clips to give audience clearer illustrations and give a mental picture beyond the conference timing to reflect back to even in the nearest future.

I've been in this position a few times actually when moderating panels or hosting a stage. Take them aside 1:1, walk them through the agenda and key talking points, make them comfortable. Support their own voice and don't ask them to be anyone else. This will help calm them down. They have value and insights, people will be patient to hear them.

Supporting an unprepared conference speaker is like being a pit crew for a racer—you get them ready to shine under pressure. Start by scheduling a quick, focused prep session to clarify their key messages and objectives. Provide them with any missing materials, such as presentation slides or audience insights, to build their confidence. Offer constructive feedback during a rehearsal to fine-tune their delivery and timing. Share tips on engaging the audience, such as storytelling or interactive elements. Let them know you’re available for last-minute questions or support. With empathy and actionable help, you’ll turn their nerves into a polished, confident performance.

In my experience, when a speaker feels unprepared, the key is human connection and teamwork. I remember working with a speaker who was nervous about their delivery. We scheduled a casual rehearsal, where they practiced while I gave gentle feedback, focusing on their strengths. Sharing a clear outline and examples helped them refine their content, and walking them through the tech setup reduced their stress. Most importantly, I reminded them why they were invited—because of their unique expertise. By working together, they not only delivered a great talk but also felt supported throughout the process. We need to understand that preparation isn’t just about logistics—it is about building confidence as a team (although we're not speakers).