repetition! just like with a kid dogs will test you to see JUST how far they can get. with obedience, we always did the "either you can do it on your own, or i will MAKE you do it" and we never take no for an answer. ever. so if i tell them to sit and they don't, i MAKE them sit and then praise them. another idea is if she keeps seeing how far she can get, put her on a leash and make her sit when you stop walking, to assert yourself. i wouldn't necessarily ignore her if she misbehaves, i would call her out on it and tell her "NO" (they say saying her name is a positive thing, and to avoid it, because it's attention, so try to just say "NO" and then ignore her, and praise her when she walks off), BUT i would also make sure i praise her whenever she does something good, that way she knows what's acceptable and whats not. also, this will help her realize that doing "bad" things result in being called out and then good things result in attention, which she is trying so hard to get. another really good idea is to go to obedience classes, these help SO much and she'll probably learn the "leave it" command in it. good luck, and hope you post pics soon!