Many people learning English have asked me how they can improve their written English, when I got decently comfortable in Hindi I remember one thing I used to do was to keep a Hindi journal and everyday write how my day went, what I did that day, And what I planned to do for the next day, then, when I had time, I would have friends look over it for errors. I was wondering what some of you have done or are doing outside of just reading textbooks to try to increase your English writing skills