A great way to boost tickets sales is creating an event within an event. This targets a variety of audiences and results in a higher amount of people buying tickets. This also benefits the customer as they get two events for the price of one!
Mighty Dub Fest are having great success by doing this. They've created a separate event, an outdoor cinema experience of Grease, within their main festival, a VW car show. Buying a ticket for the viewing includes a same day ticket for the festival itself. They found doing so has increased their sales significantly and has given them a diverse audience for their festival they wouldn't normally reach; this could result in the customers they've pulled in from their new event coming back year after year.