My little Tink has quite the tude, too...LOL She has "broken bad" with me a couple times. Again, a firm No! works well. Also, establishing yourself as the leader is important. Basic obedience helps with that. Also, do things like pick up her food while she's eating and then give it back. Play games where she rolls over and shows her tummy. Teach her that play nipping is a no no.
It takes time, but I think that positive reinforcement works better in the long run. I don't want to break Tink's spirit and I don't want her to fear me. I just want her to learn how to be polite
Good luck!