Wouldn’t you love it if the rules of the English language were something that we could just simply acknowledge and memorize? Just like any art or science, there will always be a set of rules, but there will always be some gray areas that would need the expertise of someone who is well learned in the subject. When it comes to grammar, the same is true as well. You should be able to continue and keep learning so that you can consider yourself a true expert.
How can you possibly sharpen your vocabulary? One of the first things that you should spend time on would be reading. A lot of great writers, more often than not, are also voracious readers. But this does not mean that you would just grab any kind of reading material that you can find. It is always best that you try to read books that are related to the subject that you are usually writing about. This does not only help sharpen your vocabulary. It also provides an inspiration so that you can keep stirring your creativity.
Aside from that, you may also want to continue to expose yourself to different types of communication and media. Watching television shows and movies, going online, reading about interviews and the like will help you get more exposure to the language. Just make sure that you continue to be diligent in looking up information on words that you do not understand. Have fun!