I really consider this article essential reading for anyone who is or wants to organize - eviltoast
Big Strikes and the sabotage of the labor movement
organizing.work
Marianne Garneau challenges the current focus on bringing back large strikes, arguing that the wellspring of labor militancy historically has been worker-led action on the shopfloor.

This takes a look at the history of labor militancy on scales smaller than strikes, and advocates for guerilla labor actions as a solid foundation for larger actions like strike.

It’s a really good look at practical examples from history of how to make gains at work even when you are between contracts or maybe even don’t have a union.