Writing has rules, we know about grammar, spelling and punctuation. There are also genres of writing and each has it’s own rules of style, theme and plot. Romance is always about a relationship, the words in between make up the story but the genre insists on a successful relationship between two people. Mysteries, have their rules about dastardly deeds and criminals caught in the end. Horror has bad creatures/ people who end up being slain by the hero. You get the idea.
If you write in one genre for awhile you can line up the basic plots alphabetically and just fill in the individual details like names and dates. It can become routine and you begin to wonder if a million monkeys typing at millions of computer keyboards could not, after all, come up with a best selling novel.
So, to get out of feeling like your own cliche, read other genres. Read fiction and non-fiction. Read news stories. Read recipes! Go to the library and pick a book at random. Read things that have nothing to do with your usual writing, other than the use of words and language. In reading other genres you can find ways to break out of your own cliched plot. Small things, as the basic elements are ingrained and expected. Still, if you can get around feeling like a robot writer, that’s a good thing.