Can't believe I'm about to say this, but hear me out ... take a gander at "How to Win Friends and Influence People".
For the record, every time someone mentioned this to me, I'd cringe with disgust. I avoided it for most of my life because I viewed the content as a way to manipulate people. And yeah, maybe it kinda is, but at its core, it explains human psychology and the way our brains really work. We're just kinda selfish, ya know? Most of us need to get before we even think about giving. We've got a lot to worry about and too much to focus on sometimes.
Idk, maybe there are better books out there, better references, etc. But that book helped me with a lot of my social issues, improved relationships with my coworkers, etc. To me, it's more than just a "Tell them why they want it before even asking them" type of thing, it helped me understand the other person's point of view better, helped me empathize with their needs before charging through, full speed ahead. Instead of thinking "this is a really good idea, everyone should back me", I think more about how it would actually benefit others instead of "this is what I want, we should do it".
My landlord is really awesome, I didn't realize tipping them was a thing we should do. What's the etiquette for this? Monthly? Only when a service is needed? Etc