Strategy 1-
The most common strategy for this night is to do these steps in a certain pattern:
1. Close the right door (If Freddy comes to the East Hall Corner)
2. Check Pirate Cove
3. Check both Hall Lights (If Bonnie/Chica is there, close the door.)
4. Repeat.

Using the cameras drains up power. Because of this, it is recommended that you only look for Bonnie and Chica using the Hall Lights. Freddy cannot be seen with the Hall Lights, so if he is at the East Hall Corner, quickly close the door. If you do not check the Hall Lights often, then Bonnie/Chica are most likely going to get you. If Freddy is seen at the East Hall Corner, close the door and do not check the East Hall Corner again until you hear his laugh. After he laughs, it's safe to open the door. But before you open it, make sure you check the Hall Lights. Checking the East Hall Corner after you've seen Freddy there causes him to stay longer. 

Strategy 2-
Another strategy is to use a different pattern:
1. Check the Show Stage for Freddy
2. Check both Hall Lights
3. Check the Show Stage for Freddy
4. Check both Hall Lights
5. Check the Show Stage for Freddy
6. Check Pirate Cove for Foxy (This way you won't watch him too much or too little)
7. Repeat