I’ve used both click meeting and gotomeeting as hosts for webinars I have delivered. Each had tips on how to structure and deliver a webinar so depending on the host you are using you may find they also have a handout. I also found the information at the following link useful to get my thinking in the right place for webinar vs face-to-face delivery http://elearningindustry.com/14-tips-to-create-and-present-a-highly-effective-webinar
Something else that I have found to be very important to do before running your webinar is to ensure participants receive notification regarding their system requirements and equipment (e.g., microphone/headphones etc) so they can get organised well in advance. Otherwise you can plan a great interactive session and then find no one has a microphone so only you can talk and they can only ask questions by typing them in the messaging section.
All the best – would love to hear how you find the experience.