Whenever I hand out your writing tests after grading them, a helpless-looking face asks me that question. I wish I had a quick, sure and effective formula for improving writing skills, but I can’t help thinking that reading and writing, writing and reading,… is the way to success.
There are some good sites which can help you on your journey to better written English. I recommend you this one today.
Feel like blogging? 
Cool site, love the info.