Please, please help me! I need to bring up my grades?

I'm a junior now and the first years in high school are pretty hard. I know plp tell you to try your best but thats not really an answer.My solution was to b organized. Have a binder with different sections or a notebook for each cl. Try not to do ur hw at the last min, Pay attention in cl ( but dont over do it, still chat with ur friend next 2 u), n study every time you have a test coming up. Study wont be that hard if u payed attention, just review ur notes for like 30 min. Thats all i guess, it takes time but it improved my grade. Hope i helped