John Haydon has a great blog post on collecting email addresses on Facebook pages.
Many unions use Facebook to promote campaigns but miss the critical step of leveraging the connections to their campaign on Facebook.
His video shows you how to configure your Facebook page settings to place a sign up form or a petition directly on your Facebook page.
Using Rank and File Tactics to Increase Your Union Organizing Success Rate
What Research Tells Us About Young Workers in Unions
What a Good Union Facebook Page Looks Like
Union Leaflets: How to Cold Leaflet (If you must)
Union Organizing and Facebook
Interviews with Organizers: Bob Oedy
Creating Cheap Stands for Union Banners
Union Organizing Leaflets that Work
Get Better at House Calls
Collecting emails on online Facebook campaigns