Hey, I got in to H on the first round of acceptances and my numbers are similar to yours (175 and LSAC 3.78). I'd say you're definitely in the running...and you have time to bump that GPA up in the next two years. I'm not expecting acceptances at YS because my GPA is low for both and I don't have groundbreaking softs, but maybe if I hit 'em with a 4.0 semester they'll give me a second glance, we'll see
As for extracurriculars, I would say that since you are only a sophomore, you still have time to get involved in something you enjoy, show commitment to it, and get a leadership position. That was what I did for 3 clubs...nothing "law related" (though I did talk about one of them in my PS), just things I enjoyed and stuck with. one of them was a club sport for crying out loud, not exactly earth shattering. If you like radio, do student radio; if you like theater, do theater; if you like intramural basketball, do that; if you like prelaw club, become president. Just think about what you like to do for fun or what you are interested in, find a club that fits, and if there isn't one start it
Also do something productive with your summers. I was lucky enough to get to do internships (again, nothing extremely original or prestigious), but from what I can tell, summer work is just as good. as long as you aren't sitting around playing xbox live all summer I think you will be set.
I don't think study abroad will make you stand out because so may people do it. However, if you haven't spent time in the US, it might give you a sense of what studying here is like....your english is already quite good, but it will also help with that.
anyway I too am just a lowly 0L but those are my thoughts. hit me with a PM if you have any follow up questions or thoughts. 加油!