For Freddy, What i do is listen for her 5th laugh, and when that comes around i close the door on the right, once she laughs again i open it.
she moves from closet to kitchen back to closet back to kitchen, when shes in the kitchen you have to close the door.
Its not like The original FNAF 1 Where you watch her to keep her in place.
Sixth night, A tip for the sixth night is to keep your camera on foxy at all times, check Foxy and then the doors, And do this pattern.
Thats how i beat the 6th night
Make sure to pay attention though.