" Another training strategy is to change your speech habits, which are also deeply ingrained and therefore require effort to modify. You could, for instance, try speaking only in complete sentences. Break the adolescent habit of peppering your discourse with “like” and “you know” constantly. Avoid abbreviations, so that you always call everything by its full name. Say “yes” and “no” instead of “yeah” or “yup,” “nah” or “nope. "

― Roy F. Baumeister , Willpower: Rediscovering the Greatest Human Strength