What to do in these long holidays?... Goin' to college next 2 next month?

You are doing all the right things though preparation for IAS at this stage is unnecessary.Spanish will be very useful and you must try to pick up the language in these two months..You could try the violin or guitar during these holidays.Early morning volleyball,spanish and violin could put you in the right state of mind to plunge headlong into studies from August onwards and you are bound to excel with this frame of mind.Best of luck.