How to fix my horrible skin!!?

I have HORRIBLE skin. I have no idea how to take care of it because the rest of my family has always had near perfect skin. It is dry in some spots and really oily in others. I get horrible breakouts and have quite a few blackheads. What are some ways to get my skin into good/great condition w/o spending a fortune on skin crap. I have used so much crap it is not even funny. Everything either makes my skin way too dry or way too oily. I even bought proactiv, that made my breakouts WORSE!! HELP PLEASE! I am so sick of my skin!!!