stele32 gave you great advice about sat2s. Also, try to take the math2c test not the 1c if you can. However, whats even more important is that you really keep up your grades next year because they are looked at very closely by adcoms, especially if you apply early. For your ecs, that list is huge! But it really doesnt need to be. Do not include things like "AMC (American Math Competition) Participant" b/c everyone and their mother is. haha. Anyways, just list the things that will really make you stand out. Also, DO NOT attach a resume. I just finished reading the new Michelle Hernandez book and she definitely advised against it. As I have said on earlier posts, show adcoms your depth, not breadth with your ecs. They should set you apart, but if you have a laundry list, you will just blend in and be sent to the reject pile.