I used to be highly antisocial during most of my time in middle school. In 8th grade I had an image change, so that really helped and harmed my self esteem in different areas. It helped by making me much more social and for the most part thought positive of myself for the first time, and at the same time I was faced with the issue of conformity. As a result, I still do this today with my own touch, is I would observe the way people sit in their seats. Then I would mimic them, so my posture matches their own. Nowadays, I do the same thing, but I look around the room to see who carries themselves out well and I...challenge them, in lack of a better words lol.

But enough about me, that probably wouldn't help you with social skills all that much. But it may improve your confidence. The secret to long lasting conversations and friendships with others can be found in a quote by the Roman poet, Publius Syrus: "We are interested in others, when they are interested in us." Talk about what interests the other person (theirself), and they'll go on for ages.