So, what's your hurry? Is there some pressing issue causing you to take a rapid-fire snapshot? In most cases, the answer is "No." This is the most important of all the photographic fundamentals. Don't just settle for what is quick and easy. Use the "quick and easy" image as a starting point, then see what can be done to improve upon it. The following Fundamentals Web pages will give some specific technical guidelines, but they are of no value unless you take the time to consider their use.
Ok, sometimes you need to take a quick photo. Many times, you probably knew you were going to a setting where you might need to take a quick one. You will find you can often prepare for many of these expected quick photos by giving some thought of what might present itself and doing some advance physical and mental preparation. Will you need a flash (is it dark or do I want to use the flash as "fill-in light" in the daytime)? A telephoto or close focus lens? Do you need to review any information on how to set your equipment? How many pictures are left on your roll of film? Is your extra roll of film the same as what's in the camera or will you need to change the settings on your camera and flash? If you might need to take a quick photo, will you be standing or kneeling? Should you go ahead and attach your camera to the tripod and carry the two together?
Ok, sometimes there is the quick photo which you couldn't anticipate. Go ahead and take your best quick photo, but try to follow with a second - more thoughtful effort.
Taking the time to see the possibilities in a scene is the element which will bring snapshooters the most short term improvement in their work. In most cases, they will quickly see improvement and this success will support a continuing thoughtful approach to photography. More and more technical elements can be added over time, but the habit of "Taking The Time To Think Before You Shoot" is the key foundation block of every accomplished photographer.