A set of current 30-minute videos:
Talk Data to Me Webinar Series: How to Excel Using Tableau
Talk Data to Me Webinar Series: Rapid Fire Tips & Tricks
Talk Data to Me Webinar Series: Hot Dirty Sets
Talk Data to Me Webinar Series: How to Excel Using Tableau, Part 2
Talk Data to Me Webinar Series: Become a Mix Master with Data Blending
Talk Data to Me – Data in the Wild: Transforming Excel, text, and other stuff into data you can use.
Talk Data to Me Webinar Series: Table Calculations: A First Foray
Talk Data to Me: Data Visualization Best Practices
Talk Data to Me Webinar Series: Salesforce Canvas