OK. Here we go. Everyone wants to take outstanding photos when they pull their camera out and start shooting. Sometimes we succeed and sometimes not.
Before future posts get into the nitty-gritty, we need to establish a baseline. That baseline will be different for each of us, since we each have different tastes and interests in what we like to photograph. But there is one common denominator for all of us (I'll get to that shortly).
You should grab some magazines or books that contain pictures (doesn't matter if the subject material is of interest to you), and haul out some of your stuff to look at. As you view each picture, you will either like it or you won't. Now comes the factor that is necessary for any of us to make our own images look better. That is simply being able to describe what it is about the photo that makes you like it or not like it.
Every picture has many things at play. Whether they play nice together is a highly subjective decision that each viewer makes based on their own biases. But, unless and until you can say what it is about an image that makes it good or bad for you, you won't be able to improve your own photos.
Once you have developed this ability, you will start taking a more interested look through the viewfinder (or LCD screen) before you press the shutter button. The end result will be far more pictures that will make you feel good about your skill behind the camera. It doesn't matter what kinds of pictures you shoot, when you spend an extra second or two analyzing what you're looking at through the camera lens, you will improve the finished product.
Now, go do your homework!