I just read an enlightening article entitled, "15 Words You Should Eliminate From Your Vocabulary To Sound Smarter" and it is a MUST READ. Not only does it detail the words we should eliminate from every day conversation, but it gives detail as to why these words should be eliminated.
Words most of us use regularly like "that," "honestly," "literally," etc. are on this list. I know we likely won't remove all of these words from our conversations. For me, there are some words on this list like, "amazing" and "really," that I will probably continue to use more regularly than I should, but reading the article and choosing our words more carefully is the lesson in my opinion.
I urge you all to read the article and see how many of these words you're using!