As you may anticipate from a FNAF game at this point, the animatronics progressively become more hostile as the evenings go on. Use the early evenings of FNAF 4 to obtain a sense of the animatronics' movements and, more crucially, to become familiar with their noises when they are standing in the light of your open doors.
Shut the door if anything at all sounds strange.
Strategies, cheats, and hints for Five Nights at Freddy's 4
Never, after sprinting to the door, shine your flashlight down the corridor. When you turn on your light, any animatronics that are standing close will start to charge at you. Instead, give yourself a few seconds to listen before turning on the light (which admittedly becomes harder to do as the animatronics become more active). Close the door if you hear anything that isn't part of the background music for the game. In fact, if you have any doubts about a noise, shut the door. Although it's not a sure thing, it might be of use to you.
periodically look behind you
Don't forget to occasionally turn around and flick your light at the bed even though it's simple to acquire engrossed in the routine of watching the doors. There, Little Freddies frequently gather, and if there are too many of them, Freddy Fazbear himself—or, worse—the leader of Nightmare Fredbear if it's Night Five—will brutally finish your game.
Was it a squeak from the closet door? Foxy is in town.
Strategies, cheats, and hints for Five Nights at Freddy's 4
Prior to hearing the closet door creak and/or noticing it move, wait to examine your closet. Foxy (or Nightmare Fredbear on Night Five) moves in at that point. Once that occurs, include the closet frequently in your patrol, even though you probably wouldn't want to.
Prepare to instantly close the door after checking the closet.
When you flash your light inside the closet, Foxy will frequently spring out. If you act promptly and use Nightmare, this won't lead to a game-over. On Night Five, Fredbear works by himself.
Nightmare On the sixth night, Fredbear is the only animatronic who stalks you; no other animatronics are there. However, he acts a little differently than usual and is enough energetic to make up for his missing friends. If you shine the light at him while he is down the hall, he will move closer rather than back away, so close the door if you hear him coming from either side (this is when good headphones come in handy!).
Lucky you, he also appears on your bed and in the closet, so keep an eye on those places as you would on a "regular" night gmail.