As soon as a person register for your webinar, send them a thank you mail and a confirmation mail. Sending this is not only good manners, but will also help get a confirmation from the registrant side.
? Allow time for Q&A:

Things you need to know before hosting a webinar

? Craft your copies:

? Spread the word by blogging:

? Schedule your webinar properly:
? Q&A sessions:
? Reach Highly Targeted Audiences:

? Start on time and end on time: