In order to improve his writing, Hunter S. Thompson, the author of Fear and Loathing in Las Vegas, copied The Great Gatsby word for word.
When I discovered this back in 2014, I decided to keep the tradition alive by copying one of Hunter S. Thompson’s books, The Rum Diary, word for word.
From personal experience, I can tell you, this method will improve your writing practically overnight.
10/10. Would recommend.