What do I need for running away?

Yeah so. My parents are REALLY pissing me off more than usual lately(see my other questions for more details: http://answers.yahoo.com/question/index;_ylt=AtUkK1ca_GNQlQt3hokSp73sy6IX;_ylv=3?qid=20110701173048AAmMPLF ). I'm not saying I'm planning on running away within the week, or even anytime soon. I just want to be prepared in case I'm ever going to. So what would I need? Like, I'd obviously need food, water, clothes, shelter, things like that, but where would be a good place to go and how should I get there? (where I live there's a ton of airports/train stations/bus depots btw)