"I always feel that I am arguing the same point. How can I make my essays stand out more?"

My recommendation would be to broaden your net. Do not restrict yourself to the traditional readings of "Shakespeare" or "Jane Austen". There are hundreds of academic essays written on these topics every year and doing what everyone else does is not going to help you stand out. Think about your other interests. If you are interested in politics, try and approach Shakespeare through a political perspective. If you are interested in economics, then try and approach Jane Austen through a post-colonial economic perspective. Get yourself access to academic theory from other disciplines (as broad as you like), go to conferences and widen your general contextual understanding. It will give your essays a unique edge that will get you marks for creativity and demonstrate your ability to engage with other topics. Remember, your argument (no matter what new idea it introduces) still needs to be relevant to your literary topic. All points must be justified and evidenced. Always best to check your approach with your university supervisor/ professor/ teacher, and to justify why you think your literary topic needs to be approached in your unique way.