1. Mail a postcard to attendees three weeks before the show; invite them to your booth with an intriguing incentive.
2. Mail a special invite to key prospects and customers for a VIP reception. Ask them to RSVP by phone, email or URL.
3. Call key prospects and customers as a second effort.
4. Send an email to all confirmed attendees 3 days before the event.
5. Email the non-respondents one last time.