I need help! with fashion!?

ok,so every school year i get bored with my clothes,becasue i buy outfits at thebegginning. and my mum doesnt let mebuy a whole lot more after. So anyways, this year,iwill be a freshman in highschool and i figured i hould just buy a bunch of pieces that i can match differently and so on, but i havent a clue what i should all get. please help! if someone could give me a list of stuff i should get, nothing to expensive, that i could wear differently for the school year that would be great. please include shoes and accesories to! my style i a little of everything. including sporty, fashionista, trendy, preppy, unique,bohemian and so on. no goth stuff though. i like most kind of jeans except super flared, and i like somehigh waisted stuff. also, i love delias, jc penny, wetseal,charlotte russe, aeropostale, buckle, and stores like that. thank you!