It's a matter of PERSPECTIVE!
Most of the time it is a matter of NOT shooting while standing erect. If there is one thing I tell my fellow fledgling photographers, its: Don't just STAND there.
Get down on a knee (this also creates a more stable platform).
Stand up on a table. Climb a tree. Lay in the grass. Change YOUR perspective. Get so close to something that you think it may bite you! (OK, that may not be for some of you, just us adrenaline junkies.)
As photographers, I think it is our duty to do two things: 1) show people what we want them to see and 2) show people something they have never seen before.
Well known photographers of the early 1900's such as Barbara Morgan, Alfred Stieglitz, and Yousuf Karsh traveled to far off lands to bring back images for their audiences to oooh and ahhh over.
Masters like Ansel Adams studied their subjects in such depth that their perspective was discovered through long hikes, hours of sitting and watching the light play across the landscape, and a genuine love of their subject.
Whatever your perspective is, make it your own. Submitting images that are rejected because their are too many of a certain subject should not be an issue if you pay attention to your perspective. Whatever you do, DON'T JUST STAND THERE!