NBME/ STEP questions

I’m a first year medical student about to finish this first year and I still being a bad tester. Every-time I make my bigger effort it goes worse than if do not study that hard. I have all the information in my head but I just don’t know how to answer. At least in my practical skills I always have an outstanding grade. But I know I have to improve because in this career the exams, at the beginning ,are everything. So what you’ll recommend me?