Summer Advice

hey,

i'm a student at a target. i was wondering how and what i should i do to spend my summer productively. i am currently a sophomore.

i have a good GPA, 2 internships (1 at a BB PWM and another at a hf), good business ECs.
currently, i am going to be taking 2 summer classes and through talking with my friends some of them only did 1 internship, while others did 3 and still can't land a job. it makes me feel that internships aren't as valuable as i thought they'd be or as trumped up as they are on this board.

What is the best way I can spend my summer to position myself for next summer (junior summer 2013)?

also, last summer 2011 i took 13 credits of summer courses. would it be worth mentioning on my resume that I did this?

any advice/thoughts?

thanks