You can use English newspapers and watch English TV shows that will help you learn new words for conversation. You can also buy and English dictionary to help you see the spelling of new words, and look up the meaning of new words.

I find that having a teacher or a language partner is the best and easiest way to understand how to learn a new word. I keep a list of words I want to know how to use and ask my teacher or language partner at our next meeting. Of course the dictionary is also a great tool for immediate feedback.