The first rule of writing is not to try to sound like a writer. Sound like yourself. I learned this from teaching creative non-fiction at a university. The students who dashed off a quick couple of paragraphs to get an assignment done produced far more authentic work than those who tried hard to do "real writing."  

What does that look like?

If you don't use a word in your speech, maybe it is not a natural, and therefore the best choice, for your text.