Do you want to improve on your vocabulary? If so, then you need to do this as soon as possible. Read books. Yes, isn't that easy? You can start with books that you are more interested about. In my case, I love to read self help / self improvement books. So what I do is to set aside a time to do a quiet reading. Quiet reading for me means that I dedicate a day for reading a book. I keep a pace that is manageable, stopping from time to time to write some notes, highlight some texts and underline some words that I cannot understand. Then I use my dictionary or iPad to know the meaning of the word and write a quick note in it if I am holding a physical book. If not, I just write it in a little notebook and save it for future reading. Then I look for ways to use that word in conversations. I ask for feedback if I am using it right, then I focus on doing it with the next word and so on. See, it is easy to improve on your vocabulary. Just dedicate a time to read books that interest yo