My personal favorite thing so far has been learning some of the little social "rules" in terms of body posture and speech patterns.
Basically, learning to shed the male dominating behavior and defensive behavior. Basically, men tend to lean their shoulders forward, lumber around a bit, and they talk in a manner that's very blunt, forceful, interrupting, and basically trying to get results fast. Where the female social behavior is all about being relaxed, being open, and using body language that is welcoming and inclusive rather than defensive and threatening.
I'm still learning this. But it has been REALLY fun to learn to relax and connect with people, and to start talking to other women with the intent of making social connections rather than just demanding something. The sheer difference in how women treat you when you do that is simply remarkable. They smile more, they relax more, they use a more dynamic voice that tells you that you've kind of been "allowed" in their personal emotional zone, and they want to talk with you. Where talking to them like a guy usually just ends up in quick defensive answers. I LOVE making emotional connections with people like that! It's what really started making me feel like I was finally being treated like a girl instead of just like a guy. All through my life, I've hated it when people gave me that defensive quick-answer treatment that they always give guys. Where now people are finally talking to me and connecting with me.
Basically, all you have to do is think in this way...
Women talk to make social connections with people. Men talk to get results. Women use body language that's relaxed, to make the other person feel welcome. Men use body language to assert their dominance, and get points across. With those things in mind, study actual men and women doing these things, or women making speeches versus men making speeches, and you'll learn very quickly how to communicate with people like a woman.
And wow, doing that feels SO good! It's been my favorite part of transition thus far, learning to have emotionally-connected "girl talks" with other women.