There a few resources I find myself going back to time and time again in terms of supporting my kiddos in the area of social skills. Here are some of my favorites!
Michelle Garcia Winner's Social Thinking is something I use something from every single day. Whether it's the whole body listening language, expected/unexpected vocabulary or thinking about you tools, I use it non-stop. To get started, I recommended this and this.
You can view all the Social Thinking products on their website here.