Reading and writing go hand in hand -- one helps the other. Neither is easy as beans. For most Chinese immigrants, the only serious works they wrote in English were their thesis. Boy, I remembered what a struggle that was! I was caught flat-footed because I didn't pay attention to practicing writing while studying for the degree. I read papers a lot but only focused on the experimental sections, not the way to tell a good story with logic and rationale. In scientific research, data are critical. In the business world, explaining the data to a wider audience with style is more important.
It might sounds offensive to some, but the truth is that most of us only complain about our inability to write without ANY effort to look for help. When was the last time you asked your colleagues to proofread your writing? When was the last time you enrolled in a writing class? When was the last time you wrote a message in English in WXC? When was the last time you search online "How to improve writing skills". I can reel off a log list of things you might want to consider if you are serious about improving yourself. But I would rather leave that daunting task to you for a good reason: There are tons of information out there, and you have to separate the wheat from the chaff, including analyzing this post.
Don't pay lip service to hard work. You don't know who's swimming naked until the tide goes out! Start to put your acts together NOW.
One muggle