How can I build my resume in two months?

If you're a freshman, go surfing. Otherwise use the search function.

Mahalo

Go to India and help asian tigers from going extinct....

OR

Go to India and become a bollywood actor.....that would be an EPIC discussion when interviewing for IB...

How old are you? If you finished classes last week does that mean you are in high school or taking summer classes?

I suggest either scramble for an internship or do some volunteer work. Travel if you have the means.

I've recommended this once, but I'll recommend it again - go teach one-legged kids in Zimbabwe to play soccer

If you're a senior going into college: Call up Northwestern/AXA, they'll probably hire you over the phone.

be a volonter at / in something that you are good at and it interest you. this way you will learn something new and will look good on your CV + feels good.

ask a professor for an internship through his consulting firm/business if he has one.

otherwise, get a job as a research assistant for a few months.