Originality is good, and it's important, but it doesn't mean you have to make some incredibly new discovery, it just means you have to do things better. The most original thing in teh world is a good story, well told, that's filled with wonderful characters.
YOU are an original. Get yourself, what you know, what you think, what you believe, what you feel, into your fiction, and it will be original, if you do it well enough.
On a more practical side, two places where most writers should be and could be more original are setting and character. Most writers know some setting that may never have appeared in a story, and that they know better than any otehr writer alive, be it some small slice of a city, maybe the one or two blocks where they were raised, or a place they worked for years, or a small town somewhere, or a slice of countryside, or you name it, but they don't use it in fiction because it doesn't seem important enough, or esoteric enough, even though editors and readers who had never been there, who have never seen it in a story, would find the setting both of these things.
And writers too often try to build characters, try to make characters something that fit a story, something above and beyond reality, but that are really just like the characters agents and editors see all the time. The characters editors and readers never see are teh real people in your family, your real friends and acquaintances, the people you work with, the plumber who fixed your toilet, etc.
These, too, are really part of who you are, part of your experience, an d8they helped shape your life view.
You are the original component editors are readers want to see. You, and everyone you ever knew, everything you ever did, everything you've seen, the way you think, feel, and believe, and the way those real people you known think, feel, and believe.
