Whenever you find a phone number in the game, try calling it. For example, the number in the "Save The Manatees" book in the library, the torn note for the pharmacy in the school halls, Tony's pizza by the phones, the judo club near the gym, the detective's number in Jake's locker (the newspaper) , the number on the matchbook in the boiler room (after you are locked in), and Maxine's Diner number on the same matchbook and containers (after locked in).