Improving oral and written communication

To improve vocabulary, the best method probably is to read anything and everything you get your hands on. Make a dictionary your constant companion and look up any new word you run across to make sure you understand its meaning. Of course, having a good vocabulary won't necessarily make you a better speaker. The key to better conversational skills is to learn the skill of listening, rather than to try and impress people with one's oratorical skills.

Good luck.