Instructions
Learn the personalities of the ghosts, and the order in which they exit the ghost house.This helps you prioritize threats by learning the patterns of the ghosts. For example, the red ghost, Blinky, is specifically designed to shadow Pac-Man around the maze, so going around short loops can help lose him or cause him to lag behind.
Avoid the corners unless absolutely necessary. When ghosts go into "Scatter Mode" at random intervals, each one of them heads for a pre-determined route in one of the corners, so Pac-Man can get caught inadvertently by a ghost that might actually be heading away from Pac-Man.
Induce "Frightened Mode" in the ghosts at regular intervals to reset their behavior temporarily. If you are being tailed by ghosts, eat as many as possible to send them back to the ghost house for a few seconds to allow you to clear out the dangerous corners of the map.