While in our everyday speech we may speak casually, for a student who wants to develop his intellect as much as possible, vocabulary should continually be built upon. Any time a student encounters a word that is unfamiliar, that student should write that word down, look up its definition, and use it in a sentence. Keeping a vocabulary notebook is a super idea for any student, even adult students. A good way to develop one's vocabulary speedily is to read certain authors who use lesser-known words. An example of a current author is Charles Krauthammer who recently published "Things That Matter." Even an educated person will find words in this series of essays that can be learned. Never underestimate the power of a strong vocabulary!