multitasking.
You can focus on each and still achieve your goals in each, it just takes a little hard work. Sure its hard at times to get the motivation to go to the gym when you know you have work later or a project to get done but either you man up and get whats got to be done, done or you dont.
You have to balance everything in your life and to be honest man me and you (being in highschool or just leaving it) we have it easy! People always say enjoy it while we can and even though I haven't experienced it fully yet I can say we have it easy atm.