Step 1: Develop a keen sense of disinterest
Train yourself to focus on the irrelevant. Practice staring out the window, watching paint dry, or contemplating the meaninglessness of existence.
Remember, the key to glancing over is not to be distracted by the task at hand. Stay focused on the nothingness.
Learn Advanced Tactic 2 - Flicking Through
Learn Advanced Tactic 3 - Staring at a Wall
Don't get bogged down in details. Glance over and move on.