Do attendees get a copy of the presentation?
Toward the end of each presentation, I invite the audience to go to a dedicated page on my website and sign up for follow-up information. By doing so, they will receive a version of my presentation by email usually within the hour. I also occasionally send out additional research and findings relevant to their interests, and of course they can opt-out of the list at anytime. This format enables them to keep in touch with me and ask any follow-up questions that they may have...even years later!