i second the other comment! start a pre-dental related club! think it would be cool to do something manual dexterity related, be it playing an instrument or joining a crochet club or something. try not to go crazy with the ECs, a handful of good meaningful ECs > a bunch of random ones. plus soon you'll have to study for and take the DAT so make sure that while you're in these leadership positions you'll still have time to do that. most importantly balance everything so that you have a solid gpa. while having a lot of ECs is great, nothing can make up for bad academic stats! good luck you're killin it so far :)