The goal is to prevent a high frequency of landings occurring in a short period of time. Less traffic density means less chance of an accident. This is similar to the idea that eliminating tailgating reduces the chance of accidents on the highway. To stage the approaches to the landing area, you must look way ahead and predict how the traffic will arrive at the landing area. Then, adjust your fight path so that you have as little traffic as possible when you are landing.
Planning is the name of the game.
First, look all around you after opening. See where everyone is. You're trying to stretch out the time period that all the landings will occur by getting the landing process started sooner. If you don't do this, you may start crowding up the traffic behind you, just like a car driver would if he drove slowly in the fast lane. If you dive down and try to set up on final approach early, you will probably be passed during your final approach.