I think your question is too broad..... If you listed a topic that you have chosen or something like that would be helpful for others to answer your question.
In my case, I have always used my own story for college application essay. (Not a business major) I used story telling format. But, it always isn't a good plan if you don't think you have a good and dramatic story that you can share and attract the reader.
And for supplemental essay, if they ask me why UBC(British columbia?), then I might say that I love the city of Vancouver. (I do love in my real life) And list what I love about vancouver. Also, in my case, I do love snowboarding and all sorts of winter sports (Ice hockey). So, I will say that I love whistler and I know that UBC students can get cheaper bus ticket to whistler and since the Bus leaves from UBC campus, it is always a plus. And for hockey, i would say that Vancouver canucks is my favorite hockey team and being able to go to their home game while at UBC is very exciting....
I don't know whether I answered your question in the way that you've wanted. I hope this helps though.
Please look at my post as well !!