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