How can I improve in written communication

If you want to improve your written communication skills, then you should "think" a lot before you start writing. To write clearly and nicely, you have to think clearly. Consequently, before you begin writing, take a step back, and line up and gather your thoughts on whatever it is that you have to write about. Another thing that you should do, as overused this may be, you need to "read and write" a lot, in great volumes. For reading, find works or books that excite you or interest you. If you read a book that you like or find interesting to read, you are most likely to read more books and enjoy the act of reading. This will help you with your writing process. When you read, you will find yourself thinking of all the things you could've done different from the author, had you been the story writer. You will want to write and do things your way. Start writing just one paragraph, it can be about anything really, every day. You'll notice a difference soon after you start.