The next time you go out and shoot, try to find interesting subjects both in the foreground and the background and then take a photo with one in focus and then the other. In order to do this you may need to find a foreground subject you can get close to in order to create a more shallow DoF to isolate the subject. As you can see in the above photo I have focused on the rocks in the foreground leaving the waterfalls in the background out of focus enough to not be distracting, but yet allowing the viewer to still tell what they are.
In the photo below, I have put the focus on the waterfalls instead which gives a different look to the same scene. Although they are framed just slightly different, I was able to still use the same area to get two very unique photos that can hold their own. One may have a preference for one over the other, but when it comes down to it, if you were to just view one or the other, they are both able to make nice photos.
For me they both give a nice relaxing peaceful feel to them. If you shoot like this and try to choose one to keep over the other, try looking at them as different photos rather than which is better than the other. Even though both photos technically contain the same elements, the focus on them make them unique photos. I hope that if you keep this in mind it will help you capture a shot just by changing the subject you are focusing on to see how it turns out.