
click to enlarge
If you can't see your subject clearly then chances are neither can your camera. The closer you get to your subject the more detail is revealed and colors become much more vibrant. Photographs that are taken from afar, unless by intention, often look like they were taking "spare of the moment" or by mistake. The human eye instinctively wants something to focus on, bring the focus of your photograph in close and reveal us much detail as possible.
Unless you are photographing an inanimate object, you will not only need to get in close but also anticipate the action. You want to take your photograph at the best moment and catch the event in all its glory. As an example if you are photographing a sporting event, being able to anticipate the action is of utmost importance. Catch a shot of the baseball as it hits the bat, the basketball as it leaves the hand or the puck just before it enters the goalies glove. You are looking for these shots. Anticipate the action and know, in your mind, what you want the shot to look like beforehand.
A telephoto or zoom lens is not nearly as good as being able to get in close to your subject but many times this is your only option. In situations where getting closer is not an option, photographing birds for example, buy a good quality telephoto lens and learn how to make the most of it.
(Image: http://www.sxc.hu/pic/l/m/mo/mooncat/836078_64940995.jpg)