It's simple. She obeys me (or does something good out of the blue), and she gets a star. She disobeys me (or does something naughty out of the blue), and a star is erased. When the chart is full, she gets to watch some Angelina Ballerina, her current cartoon obsession. (That's Angelina, the dancing mouse, at the bottom of the chart.)
It hasn't suddenly eliminated every tantrum or defiant act, but so far it's sure helped motivate her to obey! It also seems to help us relate to each other in a more positive way. Chickie is excited to obey, because she wants a star, and I am encouraged realizing just how often she really does listen to me.
At some point...in another day, or month, or year...this will cease to motivate her. I'll have to dig deeper in my bag of tricks to find something else that works. But for now, Chickie's Obedience Chart is making my day a lot easier.