When you use big words, people will automatically think you are smart. What you do is sign up for one of those “word of the day” websites where they email you a new vocabulary word everyday. You read it and look at the definition, repeating it out loud a few times to commit it to memory. You then try to make up a sentence using that word. For example, “My wife wants to have an effigy of herself in the store to help sell the new line of Esthetician Equipment.” As time goes on, you will add new words each day and build your vocabulary.