A.V.
I would start with the behavior that bugs you most and work on it with her. She will need to be reminded often - close your mouth when you chew, elbows off the table, put your shoes in x location, etc.
Consider getting a bin and anything left in the main area of the house is put in the bin and they have to earn it back. If they don't seem to care that it's gone (my stepdaughter was like that), then donate it. My SD didn't take very good care of anything when she was younger. I stopped buying her expensive things. What, your CD player broke? Well, that's a shame because now you have to live without one. Gee, somehow after living without one for a bit she wised up.
Remember to praise her for what she does well and bear in mind that parenting is a marathon. You have at least another 9 years to civilize her. Do teach her what she needs to learn, but don't get caught up in small battles and lose the big picture. Habits are hard to break.