1. Use an online registration site. Choose one that's easy to use and that can capture all the info you want to share about the event. One great thing about these sites is that they can show all the event information and also take registration and payment info from participants. This can make your life a lot easier.
2. LinkedIn. Here, you can send invitations to your contacts. Since many of these individuals are in a similar industry, it increases the number of attendees you'll have at your event. Additionally, you can promote the event to particular groups that have been created on LinkedIn.
3. Twitter. You can advertise here in several ways: Create a specific hashtag or send a direct message to your followers to reach several people who can help you promote your event.
4. Send email newsletters. Sending an email to your contacts can be another way to get the word out about your event. While social media is picking up steam when it comes to getting info out to people, email marketing is still a great way to promote your event.
For four more tips, check out 8 Places to Advertise Your Events.