The New Organizing Institute (NOI) has put out a great resource they're calling the Organizing Toolbox.  It's a lesson series based on the fundamental principals of organizing. Each lesson incorporates video (some are coming soon) from some of their live trainings that they do. The lesson plan follows the path of a traditional organizing program which includes: telling a story, creating a structure, mapping out a strategy, and taking action.

This is the introductory video to the series:

These lessons are a must for any aspiring organizer. 

Overall, NOI is a first-rate resource for organizers at all levels. They're always publishing new articles, many of which are useful organizing tips, and their resource center covers a wide range of topics and is very practical.