Patience, calm and consistency. When she bites, say "No biting, hurts mama" and immediately remove baby from the breast, put her down, and walk away for a few minutes. You can nurse her again in a few minutes if she is still hungry. This should eventually teach baby that biting results in the immediate end of fun nursing time.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"