I am a inspirational speaker living with type one diabetes. My show, The Sugar Free Shawn Show, is an on line show that serves the diabetes community of healthcare providers and patients.
Advertisers are going to want to see stats: page views and any demographics about the viewers like where they are coming from so there can possibly be targeting. Anything that can be see as a media extension, like social media follower numbers would help you prove to advertisers why they might want to spend money with your show. If you can package that together in an easily digestible way, that is easier.
(Full Disclosure I am on the team at BSA)
At BuySellAds.com we make it really easy for independent publishers and content producers to do exactly what you are trying to achieve.
Check out how easy it is to embed scheduled sponsorships to your site. http://blog.buysellads.com/2013/new-bsa-pro-feature-scheduled-sponsorships/
We also allow publishers to install a sales widget featured here that combines all the pertinent demo data that Charlie mentioned. ex. http://www.cultofmac.com/advertising-with-cultofmac-com
This allows advertisers to schedule and sponsor directly from you.