Vacation
It's called vacation for a reason. You have worked hard during school, and it's only going to get more difficult! Taking an extended vacation is not a bad idea, especially considering this could be the last time in a while that you will have the chance for a multiple-week trip. Maybe that will include a nonmedical interest, volunteering, or international travel; there is nothing wrong with taking some time off. But I'd recommend choosing from one of the above categories for the rest of your summer. Whether it's your mom or an admissions officer, someone is bound to ask that age-old grade-school question: "What did you do with your summer?" Make sure you have a good answer!
I am having fun during my summer. There is so much going on that the only thing I am blogging about these days is a quote or a thought I have been exposed to to while reading something.