Lately, I found a new website for people around the world to exchange languages by writing dairies on internet.
When you register, you need to provide the information of which native speaker you are, and which language you want to learn.
In this way, other native speakers once visit your diary, they will make corrections for wrong sentences. Thus we can learn how they write an article or speak the language. We can improve our writing ability as well.
In addition to what mentioned above, we even make friends easily with people from other countries to know more about their lives and cultures. All you need to do is keep writing diaries constantly everyday. By the way, join is free!
Website link: http://lang-8.com/