Assertiveness is definitely a challenge for me. How'd you achieve it?
Trial and error mostly.
I found I got a lot more attuned to reading people after the fog lifted from many years of drinking. That helps me deal with things before they get too bad.
I try to stay unemotional and stick to facts.
I still don't like conflict but I can stand my ground now and not feel sick about it.
The more I do it, the easier it gets
D