If you have not checked out the Ancestry.com Learning Center, you may be missing some wonderful opportunities to increase your skill in using the Ancestry site, as well as sharpening your research skills in general.
The site lists all of the webinars (a catchy phrase for on-line seminars) that Ancestry has presented. Initially you can watch a webinar "live" as it is being presented. After it's initial presentation, it goes into the archives which you can access for viewing at any time.
The topics range from those that help you get more out of your searches on the Ancestry website ("Best Strategies for Searching Ancestry.com"), to topics of more general interest ("European Research: Tips and Tools for Success").
You can see the entire selection at: http://learn.ancestry.com/LearnMore/Webinars.aspx