Here are two useful texts taken from the Industrial Workers of the World on iww.org, about how to run meetings effectively:
Here is the full Organising guide from libcom.org. Also check out their reading guides here: https://libcom.org/library/libcomorg-reading-guide
Here is a good collection of workplace organising material from an past Brisbane Anarchist group.
Here is Punching Out and the various writings of Martin Glaberman on Workplace organising.
Here is an Important book by Stan Weir about workplace organising: