the stack of Emperor + Love Bomb + direct action for that works very well for me
I’ve had a few of extremely strong paradigm shifts lately which have boosted my assertiveness, confidence and ability to establish boundaries
I’ve started to consciously change the basis of my rights on life from “I wonder if I can get it, wouldn’t fighting for it be rude/arrogant/whatever…” to “I want, therefore I can and will fight for this”. And I’m making a conscious effort to fight for what I want. I want more money - I work more. I want more sex - I work on getting more sex. I want a better social circle - I tell toxic people to never speak to me again. “I want” is a good enough reason to do something (without harming yourself and anyone around). “I don’t want” is a good reason to not do something
Another thing is that I understood the power/dominance dynamics between people and now consciously putting myself to a higher “dominance rank” through assertive demeanor. Start by improving your body language - walk with your head a bit higher, shoulders back, etc.
EDIT: this is completely safe in modern world, yet gives your brain a strong signal that you can use “alpha” body language and no one does shit about it so you must be the “alpha”. For lack of a better term
It’s a lot of work but the main principle is that you must start fighting for your wants. Fighting socially, not physically (most of the time). Because when an 80 year old lady is able to push you arount and you are sucking it up because “you must respect the elderly”, you can’t imagine how much actual damage you are doing to your psyche. You are basically saying to your limbic system that you are below her on a dominance hierarchy. Of course you won’t be able to set up any boundaries - you are weaker than an 80 year old lady.
But the opposite thing is happening when you stand your ground and tell her to fuck off - you put her in place, affirmed the belief that you are not the weakest person in the room, protected your “wants”, etc.
That’s what I’ve been doing, practicing and learning lately. And my stack helps me to go through weeks and months of growth in the matter of days.