If you have time, call the people who attended to see if you can offer them your services. Find out what they loved and also how you can improve. You should have gathered the email addresses of your webinar audience. Leverage these contacts by creating a regular newsletter with tips and special offers to incite them to join you as a customer. Didn’t save their emails? Make sure you don’t forget next time! Make your communications as personal as possible to foster a stronger connection.