Getting off of facebook...
Remember, when you go for the kill of your account and start to remove the posts you've made, plan on doing it over a few weeks. Just quitting facebook doesn't get your information out and just abandoning it could see it used for anything. Give it time and go down your wall and pull off all your posts, then as you empty that queue, their servers will dig down and start to pull up older posts. Eventually, you'll get to posts you've made on *other* people's pages - and THAT is the stuff that keeps you perpetually in their system.
Get all of that deleted so when you log in you will have NO posts on your wall/timeline page.
At that point, start to 'unfriend' people. Do this dead last, as if you do it first, you'll not be able to delete posts you've made on their pages and you'll be stuck in facebook's system.
You know that you've done it correctly, if when you login after a month or so, FB is showing you random names of people that you do not know.
Took me six weeks to get all my data OFF of facebook.