I speak publicly a bit more than monthly from groups of 50 to over 400. When I have the last slot, I make sure do a few things: 1) make the title salacious as

I speak publicly a bit more than monthly from groups of 50 to over 400. When I have the last slot, I make sure do a few things: 1) make the title salacious as I can; 2) engage those "survivors" more. In the past when in Vegas I've ordered a tray of drinks and offered them up as prizes for participating (this also works during early morning session of the last day of a big conference... Highest rated session lol); 3) depending on size (like less than 50) give them things I wouldn't necessarily give to a captive huge group, like templates, checklists, etc. 4) make damn sure my content is exciting. This means making especially not boring slides. Give them a progress bar at the bottom. 5) be more conversational, especially if it's less than 50. Anyway, my few cents ;)