Chicka and Bonnie are simple to avoid you can hear them take 3 steps before you need to close the door.
Foxy is a little tricky in that you need to check on her repeatedly but not too fast. If she is off the stage check the left hallway before closing the door. You lose less power this way.
Freddy is the complete wild card out of the bunch. Her laughs tell you if she has moved around the map. The number of laughs do not indicate if she is close or not. So always check the kitchen every time she moves. If she is in there, YOU NEED to close the right door until she moves again.
In the Higher difficulties I find Freddy as the primary threat, she goes in and out of the kitchen a lot which forces you to use most of your power and messes up your rhythm.
To get the third star you need to beat 20/20/20/20, then 1/9/8/7, then 6/9/6/9. But is anyone else crashing from 6/9/6/9?