How can I combine all these clothing styles to create my own style?

Well I like different styles and since I'm going to a new school next year, I thought I'd take this summer to completely redo my wardrobe (I'm 15, and this is something I've never done before). The styles I like are: bohemian, scene, steam-punk, hippie, and neo-victorian.... so how do I combine them all? What articles of clothing (and accessories) should I acquire before school starts??